diff --git a/modules/tm/tm.c b/modules/tm/tm.c
index b1baabed999..87f7c1377e8 100644
--- a/modules/tm/tm.c
+++ b/modules/tm/tm.c
@@ -1995,7 +1995,8 @@ int pv_get_tm_branch_avp(struct sip_msg *msg, pv_param_t *param,
 			val->ri = avp_value.n;
 			val->flags |= PV_VAL_INT|PV_TYPE_INT;
 		}
-	}
+	} else
+		pv_get_null(msg, param, val);
 
 	goto success;