diff --git a/res/values-FR/strings.xml b/res/values-FR/strings.xml
index ba8c47fde..9216fc455 100644
--- a/res/values-FR/strings.xml
+++ b/res/values-FR/strings.xml
@@ -113,8 +113,10 @@
     <string name="pref_codecs">Codecs</string>
     <string name="pref_communication_expire_title">Time out de communication</string>
     <string name="pref_incoming_expire_title">Time out d\'appel entrant</string>
-    <string name="pref_video_port_title">Port vidéo</string>
-    <string name="pref_audio_port_title">Port audio</string>
+    <string name="pref_video_port_title">Port ou plage de port vidéo</string>
+    <string name="pref_audio_port_title">Port ou plage de port audio</string>
+    <string name="pref_video_port_description">Port ou plage (min-max) pour l\'audio</string>
+    <string name="pref_audio_port_description">Port ou plage (min-max) pour la video</string>
     
 	<string name="pref_debug">Activer les traces de débogage</string>
 	<string name="about_report_issue">Reporter un problème</string>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 0464c129b..bb148dc81 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -159,8 +159,10 @@
     <string name="pref_codecs">Codecs</string>
     <string name="pref_communication_expire_title">Communication timeout</string>
     <string name="pref_incoming_expire_title">Incoming call timeout</string>
-    <string name="pref_video_port_title">Video port</string>
-    <string name="pref_audio_port_title">Audio port</string>
+    <string name="pref_video_port_title">Video port or port range</string>
+    <string name="pref_audio_port_title">Audio port or port range</string>
+    <string name="pref_video_port_description">Video port or port range (minport-maxport)</string>
+    <string name="pref_audio_port_description">Audio port or port range (minport-maxport)</string>
     <string name="place_call_chooser">Place a call</string>
     
 	<string name="pref_debug">Debug</string>
diff --git a/res/xml/preferences.xml b/res/xml/preferences.xml
index 2cfcbbb8c..945ec9a7c 100644
--- a/res/xml/preferences.xml
+++ b/res/xml/preferences.xml
@@ -83,6 +83,7 @@
 		<EditTextPreference 
 		    android:key="@string/pref_audio_port_key"
 		    android:title="@string/pref_audio_port_title"
+		    android:summary="@string/pref_audio_port_description"
 		    android:defaultValue="7078"
 			android:layout="@layout/hidden"/>
 
@@ -189,6 +190,7 @@
 		    android:key="@string/pref_video_port_key"
 		    android:title="@string/pref_video_port_title"
 		    android:defaultValue="9078"
+		    android:summary="@string/pref_video_port_description"
 			android:layout="@layout/hidden"/>
 		
 	    <CheckBoxPreference