diff --git a/debian/ngcp-rtpengine-daemon.default b/debian/ngcp-rtpengine-daemon.default
index 3c976f1b1..1f18caae0 100644
--- a/debian/ngcp-rtpengine-daemon.default
+++ b/debian/ngcp-rtpengine-daemon.default
@@ -2,3 +2,4 @@ RUN_RTPENGINE=no
 CONFIG_FILE=/etc/rtpengine/rtpengine.conf
 # CONFIG_SECTION=rtpengine
 PIDFILE=/var/run/ngcp-rtpengine-daemon.pid
+TABLE=0
diff --git a/debian/ngcp-rtpengine-daemon.postinst b/debian/ngcp-rtpengine-daemon.postinst
index 8b29de53e..60e584dcf 100644
--- a/debian/ngcp-rtpengine-daemon.postinst
+++ b/debian/ngcp-rtpengine-daemon.postinst
@@ -18,7 +18,10 @@ else
 		. $default || true
 	fi
 
-	if [ "$TABLE" -ge 0 -a -n "$NO_FALLBACK" -a \( "$NO_FALLBACK" = "1" -o "$NO_FALLBACK" = "yes" \) ]; then
+	if [ -n "$TABLE" ] && [ "$TABLE" -ge 0 ] && \
+		 [ -n "$NO_FALLBACK" ] && \
+		 ([ "$NO_FALLBACK" = "1" ] || [ "$NO_FALLBACK" = "yes" ])
+	then
 		if lsmod | grep -q $modname || modinfo $modname > /dev/null 2> /dev/null; then
 			true
 		else