diff --git a/linphone/oRTP/include/ortp/stun.h b/linphone/oRTP/include/ortp/stun.h
index 1b8dd99e2..3e4df81f8 100644
--- a/linphone/oRTP/include/ortp/stun.h
+++ b/linphone/oRTP/include/ortp/stun.h
@@ -462,10 +462,10 @@ stunGetSystemTimeSecs(void);
 
 /* find the IP address of a the specified stun server - return false is fails parse  */
 bool_t  
-stunParseServerName( char* serverName, StunAddress4 *stunServerAddr);
+stunParseServerName( const char* serverName, StunAddress4 *stunServerAddr);
 
 bool_t 
-stunParseHostName( char* peerName,
+stunParseHostName( const char* peerName,
                    UInt32 *ip,
                    UInt16 *portVal,
                    UInt16 defaultPort );
diff --git a/linphone/oRTP/src/stun.c b/linphone/oRTP/src/stun.c
index 92dd3326a..ccf83ee39 100644
--- a/linphone/oRTP/src/stun.c
+++ b/linphone/oRTP/src/stun.c
@@ -1241,7 +1241,7 @@ stunGetSystemTimeSecs(void)
 
 /* returns TRUE if it scucceeded */
 bool_t 
-stunParseHostName( char* peerName,
+stunParseHostName( const char* peerName,
                    UInt32* ip,
                    UInt16* portVal,
                    UInt16 defaultPort )
@@ -1347,7 +1347,7 @@ stunParseHostName( char* peerName,
 
 
 bool_t
-stunParseServerName( char* name, StunAddress4 *addr)
+stunParseServerName( const char* name, StunAddress4 *addr)
 {
    /* assert(name); */