diff --git a/daemon/call_interfaces.c b/daemon/call_interfaces.c
index 646b0f2f7..9fc8085c6 100644
--- a/daemon/call_interfaces.c
+++ b/daemon/call_interfaces.c
@@ -2863,7 +2863,7 @@ const char *call_start_forwarding_ng(bencode_item_t *input, bencode_item_t *outp
 	AUTO_CLEANUP_NULL(struct call *call, call_unlock_release);
 	struct call_monologue *monologue;
 	const char *errstr = NULL;
-	struct sdp_ng_flags flags;
+	AUTO_CLEANUP(struct sdp_ng_flags flags, call_ng_free_flags);
 
 	errstr = media_block_match(&call, &monologue, &flags, input, OP_OTHER);
 	if (errstr)
@@ -2892,7 +2892,7 @@ const char *call_stop_forwarding_ng(bencode_item_t *input, bencode_item_t *outpu
 	AUTO_CLEANUP_NULL(struct call *call, call_unlock_release);
 	struct call_monologue *monologue;
 	const char *errstr = NULL;
-	struct sdp_ng_flags flags;
+	AUTO_CLEANUP(struct sdp_ng_flags flags, call_ng_free_flags);
 
 	errstr = media_block_match(&call, &monologue, &flags, input, OP_OTHER);
 	if (errstr)
@@ -2969,7 +2969,7 @@ const char *call_block_dtmf_ng(bencode_item_t *input, bencode_item_t *output) {
 	AUTO_CLEANUP_NULL(struct call *call, call_unlock_release);
 	struct call_monologue *monologue;
 	const char *errstr = NULL;
-	struct sdp_ng_flags flags;
+	AUTO_CLEANUP(struct sdp_ng_flags flags, call_ng_free_flags);
 
 	errstr = media_block_match(&call, &monologue, &flags, input, OP_OTHER);
 	if (errstr)
@@ -3010,7 +3010,7 @@ const char *call_unblock_dtmf_ng(bencode_item_t *input, bencode_item_t *output)
 	AUTO_CLEANUP_NULL(struct call *call, call_unlock_release);
 	struct call_monologue *monologue;
 	const char *errstr = NULL;
-	struct sdp_ng_flags flags;
+	AUTO_CLEANUP(struct sdp_ng_flags flags, call_ng_free_flags);
 
 	errstr = media_block_match(&call, &monologue, &flags, input, OP_OTHER);
 	if (errstr)
@@ -3068,7 +3068,7 @@ static const char *call_block_silence_media(bencode_item_t *input, bool on_off,
 	AUTO_CLEANUP_NULL(struct call *call, call_unlock_release);
 	struct call_monologue *monologue;
 	const char *errstr = NULL;
-	struct sdp_ng_flags flags;
+	AUTO_CLEANUP(struct sdp_ng_flags flags, call_ng_free_flags);
 
 	errstr = media_block_match(&call, &monologue, &flags, input, OP_OTHER);
 	if (errstr)