diff --git a/src/collector/collector_sync_voip.c b/src/collector/collector_sync_voip.c
index d05c792..a9218b4 100644
--- a/src/collector/collector_sync_voip.c
+++ b/src/collector/collector_sync_voip.c
@@ -1430,7 +1430,7 @@ static int update_sip_state(collector_sync_voip_t *sync,
     }
 
     if (sessuser != NULL) {
-        strncpy(sdpo.username, sessaddr, sizeof(sdpo.username) - 1);
+        strncpy(sdpo.username, sessuser, sizeof(sdpo.username) - 1);
     } else {
         strncpy(sdpo.username, "unknown", sizeof(sdpo.username) - 1);
     }