diff --git a/libs/sofia-sip/libsofia-sip-ua/tport/tport_logging.c b/libs/sofia-sip/libsofia-sip-ua/tport/tport_logging.c
index 200ca5cb84..13eb63b2eb 100644
--- a/libs/sofia-sip/libsofia-sip-ua/tport/tport_logging.c
+++ b/libs/sofia-sip/libsofia-sip-ua/tport/tport_logging.c
@@ -180,7 +180,7 @@ int tport_open_log(tport_master_t *mr, tagi_t *tags)
                 return n;
         }
 
-        memcpy(port, p, sizeof(p));
+        strncpy(port, p, sizeof(port));
                         
         *p = '\0';