diff --git a/daemon/call.c b/daemon/call.c
index 330d4d151..90109e145 100644
--- a/daemon/call.c
+++ b/daemon/call.c
@@ -1856,7 +1856,8 @@ static void __sdes_accept(struct call_media *media, const sdp_ng_flags *flags) {
 
 	/* if 'flags->sdes_nonew' is set, don't prune anything, just pass all coming.
 	 * 'flags->sdes_nonew' takes precedence over 'sdes_only' and 'sdes_no'. */
-	if (flags && (flags->sdes_only || flags->sdes_no) && !flags->sdes_nonew) {
+	if (flags && (t_hash_table_is_set(flags->sdes_only) || t_hash_table_is_set(flags->sdes_no))
+			&& !flags->sdes_nonew) {
 		__auto_type l = media->sdes_in.tail;
 		while (l) {
 			struct crypto_params_sdes *offered_cps = l->data;
@@ -1878,7 +1879,7 @@ static void __sdes_accept(struct call_media *media, const sdp_ng_flags *flags) {
 
 			ilogs(crypto, LOG_DEBUG, "Dropping offered crypto suite '%s' from offer due to %s",
 				offered_cps->params.crypto_suite->name,
-				flags->sdes_only ? "not being in SDES-only" : "SDES-no");
+				t_hash_table_is_set(flags->sdes_only) ? "not being in SDES-only" : "SDES-no");
 
 			__auto_type prev = l->prev;
 			t_queue_delete_link(&media->sdes_in, l);
diff --git a/daemon/call_interfaces.c b/daemon/call_interfaces.c
index 2311bb8f3..02d723e2c 100644
--- a/daemon/call_interfaces.c
+++ b/daemon/call_interfaces.c
@@ -37,6 +37,8 @@ typedef union {
 	const struct sdp_attr_helper *attr_helper;
 	str_q *q;
 	GHashTable **htp;
+	str_case_ht *sct;
+	str_case_value_ht *svt;
 	void **generic;
 } helper_arg  __attribute__ ((__transparent_union__));
 
@@ -902,10 +904,10 @@ static void call_ng_flags_esc_str_list(sdp_ng_flags *out, str *s, helper_arg arg
  */
 static void call_ng_flags_str_ht(sdp_ng_flags *out, str *s, helper_arg arg) {
 	str *s_copy = str_dup_escape(s);
-	GHashTable **ht = arg.htp;
-	if (!*ht)
-		*ht = g_hash_table_new_full(str_case_hash, str_case_equal, free, NULL);
-	g_hash_table_replace(*ht, s_copy, s_copy);
+	str_case_ht *ht = arg.sct;
+	if (!t_hash_table_is_set(*ht))
+		*ht = str_case_ht_new();
+	t_hash_table_replace(*ht, s_copy, s_copy);
 }
 /**
  * Parses one-row flags separated by 'delimiter'.
@@ -929,12 +931,12 @@ static void call_ng_flags_str_q_multi(sdp_ng_flags *out, str *s, helper_arg arg)
 }
 #ifdef WITH_TRANSCODING
 static void call_ng_flags_str_ht_split(sdp_ng_flags *out, str *s, helper_arg arg) {
-	GHashTable **ht = arg.htp;
-	if (!*ht)
-		*ht = g_hash_table_new_full(str_case_hash, str_case_equal, free, free);
+	str_case_value_ht *ht = arg.svt;
+	if (!t_hash_table_is_set(*ht))
+		*ht = str_case_value_ht_new();
 	str splitter = *s;
 	while (1) {
-		g_hash_table_replace(*ht, str_dup_escape(&splitter), str_dup_escape(s));
+		t_hash_table_replace(*ht, str_dup_escape(&splitter), str_dup_escape(s));
 		char *c = memrchr(splitter.s, '/', splitter.len);
 		if (!c)
 			break;
@@ -1868,14 +1870,10 @@ static void ng_sdp_attr_manipulations_free(struct sdp_manipulations * array[__MT
 }
 
 void call_ng_free_flags(sdp_ng_flags *flags) {
-	if (flags->codec_except)
-		g_hash_table_destroy(flags->codec_except);
-	if (flags->codec_set)
-		g_hash_table_destroy(flags->codec_set);
-	if (flags->sdes_no)
-		g_hash_table_destroy(flags->sdes_no);
-	if (flags->sdes_only)
-		g_hash_table_destroy(flags->sdes_only);
+	str_case_ht_destroy_ptr(&flags->codec_except);
+	str_case_value_ht_destroy_ptr(&flags->codec_set);
+	str_case_ht_destroy_ptr(&flags->sdes_no);
+	str_case_ht_destroy_ptr(&flags->sdes_only);
 	if (flags->frequencies)
 		g_array_free(flags->frequencies, true);
 
diff --git a/daemon/codec.c b/daemon/codec.c
index 95812c2f1..0c21ab253 100644
--- a/daemon/codec.c
+++ b/daemon/codec.c
@@ -4577,9 +4577,9 @@ static void __insert_codec_tracker(GHashTable *all_clockrates, GHashTable *all_s
 }
 #endif
 static int __codec_options_set1(struct call *call, struct rtp_payload_type *pt, const str *enc,
-		GHashTable *codec_set)
+		str_case_value_ht codec_set)
 {
-	str *pt_str = g_hash_table_lookup(codec_set, enc);
+	str *pt_str = t_hash_table_lookup(codec_set, enc);
 	if (!pt_str)
 		return 0;
 	struct rtp_payload_type *pt_parsed = codec_make_payload_type(pt_str, MT_UNKNOWN);
@@ -4601,10 +4601,10 @@ static int __codec_options_set1(struct call *call, struct rtp_payload_type *pt,
 	payload_type_free(pt_parsed);
 	return 1;
 }
-static void __codec_options_set(struct call *call, struct rtp_payload_type *pt, GHashTable *codec_set) {
+static void __codec_options_set(struct call *call, struct rtp_payload_type *pt, str_case_value_ht codec_set) {
 	if (!call)
 		return;
-	if (!codec_set)
+	if (!t_hash_table_is_set(codec_set))
 		return;
 	if (__codec_options_set1(call, pt, &pt->encoding_with_full_params, codec_set))
 		return;
@@ -5099,7 +5099,7 @@ void __codec_store_populate(struct codec_store *dst, struct codec_store *src, st
 		codec_store_cleanup(&orig_dst);
 }
 
-void codec_store_strip(struct codec_store *cs, str_q *strip, GHashTable *except) {
+void codec_store_strip(struct codec_store *cs, str_q *strip, str_case_ht except) {
 	for (__auto_type l = strip->head; l; l = l->next) {
 		str *codec = l->data;
 		if (!str_cmp(codec, "all") || !str_cmp(codec, "full")) {
@@ -5113,11 +5113,11 @@ void codec_store_strip(struct codec_store *cs, str_q *strip, GHashTable *except)
 			while (link) {
 				__auto_type next = link->next;
 				struct rtp_payload_type *pt = link->data;
-				if (except && g_hash_table_lookup(except, &pt->encoding))
+				if (t_hash_table_is_set(except) && t_hash_table_lookup(except, &pt->encoding))
 					;
-				else if (except && g_hash_table_lookup(except, &pt->encoding_with_params))
+				else if (t_hash_table_is_set(except) && t_hash_table_lookup(except, &pt->encoding_with_params))
 					;
-				else if (except && g_hash_table_lookup(except, &pt->encoding_with_full_params))
+				else if (t_hash_table_is_set(except) && t_hash_table_lookup(except, &pt->encoding_with_full_params))
 					;
 				else {
 					ilogs(codec, LOG_DEBUG, "Stripping codec " STR_FORMAT
diff --git a/include/call_interfaces.h b/include/call_interfaces.h
index 9a8f976fc..f99a18ed9 100644
--- a/include/call_interfaces.h
+++ b/include/call_interfaces.h
@@ -45,17 +45,17 @@ struct sdp_ng_flags {
 	sockaddr_t xmlrpc_callback;
 	endpoint_t dtmf_log_dest;
 	str_q codec_strip;
-	GHashTable *codec_except;
+	str_case_ht codec_except;
 	str_q codec_offer;
 	str_q codec_transcode;
 	str_q codec_mask;
 	str_q codec_accept;
 	str_q codec_consume;
-	GHashTable *codec_set;
+	str_case_value_ht codec_set;
 	int ptime,
 	    rev_ptime;
-	GHashTable *sdes_no;		/* individual crypto suites which are excluded */
-	GHashTable *sdes_only;		/* individual crypto suites which are only accepted */
+	str_case_ht sdes_no;		/* individual crypto suites which are excluded */
+	str_case_ht sdes_only;		/* individual crypto suites which are only accepted */
 	str_q sdes_order;		/* the order, in which crypto suites are being added to the SDP */
 	str_q sdes_offerer_pref;	/* preferred crypto suites to be selected for the offerer */
 	str dtls_fingerprint;
diff --git a/include/codec.h b/include/codec.h
index e4b30c4c1..eab781be6 100644
--- a/include/codec.h
+++ b/include/codec.h
@@ -112,7 +112,7 @@ void codec_update_all_handlers(struct call_monologue *ml);
 void codec_update_all_source_handlers(struct call_monologue *ml, const sdp_ng_flags *flags);
 
 struct codec_store_args {
-	GHashTable *codec_set;
+	str_case_value_ht codec_set;
 	bool answer_only;
 	bool allow_asymmetric;
 	struct codec_store *merge_cs;
@@ -133,7 +133,7 @@ void __codec_store_populate_reuse(struct codec_store *, struct codec_store *, st
 __attribute__((nonnull(1, 2)))
 void codec_store_add_raw(struct codec_store *cs, struct rtp_payload_type *pt);
 __attribute__((nonnull(1, 2)))
-void codec_store_strip(struct codec_store *, str_q *strip, GHashTable *except);
+void codec_store_strip(struct codec_store *, str_q *strip, str_case_ht except);
 __attribute__((nonnull(1, 2, 3)))
 void codec_store_offer(struct codec_store *, str_q *, struct codec_store *);
 __attribute__((nonnull(1, 2)))
diff --git a/include/crypto.h b/include/crypto.h
index 6f433b6c1..1662f5d16 100644
--- a/include/crypto.h
+++ b/include/crypto.h
@@ -231,8 +231,8 @@ INLINE void crypto_params_sdes_queue_copy(sdes_q *dst, const sdes_q *src) {
  * Checks whether to apply policies according to: sdes_no / sdes_only
  * returns: 1 - to not apply / 0 - to apply
  */
-INLINE int crypto_params_sdes_check_limitations(GHashTable * sdes_only,
-			GHashTable * sdes_no,
+INLINE int crypto_params_sdes_check_limitations(str_case_ht sdes_only,
+			str_case_ht sdes_no,
 			const struct crypto_suite *cps) {
 
 	/* if 'SDES-only-' flag(s) present, then
@@ -241,16 +241,16 @@ INLINE int crypto_params_sdes_check_limitations(GHashTable * sdes_only,
 	 * This takes precedence over 'SDES-no-'.
 	 *
 	 * We mustn't check the 'flags->sdes_no' at all, if 'flags->sdes_only' is set. */
-	if (sdes_only)
+	if (t_hash_table_is_set(sdes_only))
 	{
-		if (!g_hash_table_lookup(sdes_only, &cps->name_str))
+		if (!t_hash_table_lookup(sdes_only, &cps->name_str))
 			return 1;
 	}
 
 	/* if 'SDES-no-' flag(s) present, then
 		* remove SDES-no suites from offered ones */
-	else if (sdes_no &&
-		g_hash_table_lookup(sdes_no, &cps->name_str))
+	else if (t_hash_table_is_set(sdes_no) &&
+		t_hash_table_lookup(sdes_no, &cps->name_str))
 	{
 		return 1;
 	}
diff --git a/lib/str.h b/lib/str.h
index 9a19982fd..30d571f0d 100644
--- a/lib/str.h
+++ b/lib/str.h
@@ -182,6 +182,10 @@ gboolean str_equal(gconstpointer a, gconstpointer b);
 guint str_case_hash(gconstpointer s);
 gboolean str_case_equal(gconstpointer a, gconstpointer b);
 
+TYPED_GHASHTABLE(str_case_ht, str, str, str_case_hash, str_case_equal, free, NULL)
+TYPED_GHASHTABLE(str_case_value_ht, str, str, str_case_hash, str_case_equal, free, free)
+
+
 /* returns a new str object, duplicates the pointers but doesn't duplicate the contents */
 INLINE str *str_slice_dup(const str *);
 /* destroy function, frees a slice-alloc'd str */
diff --git a/t/test-transcode.c b/t/test-transcode.c
index 18cd573dc..2701ba860 100644
--- a/t/test-transcode.c
+++ b/t/test-transcode.c
@@ -47,12 +47,9 @@ struct stream_params rtp_types_sp;
 #define start() __start(__FILE__, __LINE__)
 
 static void __cleanup(void) {
-	if (flags.codec_except)
-		g_hash_table_destroy(flags.codec_except);
-	if (flags.codec_set)
-		g_hash_table_destroy(flags.codec_set);
-	if (flags.sdes_no)
-		g_hash_table_destroy(flags.sdes_no);
+	str_case_ht_destroy_ptr(&flags.codec_except);
+	str_case_value_ht_destroy_ptr(&flags.codec_set);
+	str_case_ht_destroy_ptr(&flags.sdes_no);
 	t_queue_clear_full(&flags.codec_offer, str_free);
 	t_queue_clear_full(&flags.codec_transcode, str_free);
 	t_queue_clear_full(&flags.codec_strip, str_free);
@@ -68,8 +65,8 @@ static void __init(void) {
 	__cleanup();
 	codec_store_init(&rtp_types_sp.codecs, NULL);
 	rtp_types_sp.rtp_endpoint.port = 9;
-	flags.codec_except = g_hash_table_new_full(str_case_hash, str_case_equal, free, NULL);
-	flags.codec_set = g_hash_table_new_full(str_case_hash, str_case_equal, free, free);
+	flags.codec_except = str_case_ht_new();
+	flags.codec_set = str_case_value_ht_new();
 }
 static struct packet_stream *ps_new(struct call *c) {
 	struct packet_stream *ps = malloc(sizeof(*ps));
@@ -119,7 +116,7 @@ static void codec_set(char *c) {
 	str splitter = s;
 
 	while (1) {
-		g_hash_table_replace(flags.codec_set, str_dup(&splitter), str_dup(&s));
+		t_hash_table_replace(flags.codec_set, str_dup(&splitter), str_dup(&s));
 		char *cp = memrchr(splitter.s, '/', splitter.len);
 		if (!cp)
 			break;