diff --git a/libs/openzap/src/isdn/Q931mes.c b/libs/openzap/src/isdn/Q931mes.c
index 21dd181616..8451ff48d5 100644
--- a/libs/openzap/src/isdn/Q931mes.c
+++ b/libs/openzap/src/isdn/Q931mes.c
@@ -1482,7 +1482,7 @@ L3INT Q931Pmes_Setup(Q931_TrunkInfo *pTrunk, L3UCHAR *IBuf, L3INT ISize, L3UCHAR
 
 	/* Repeat Indicator */
 	if(Q931IsIEPresent(pMes->LLRepeatInd))
-		;/* TODO */
+		rc = Q931E_UNKNOWN_IE;/* TODO */
 
 	/* Low Layer Compatibility */
 	if(Q931IsIEPresent(pMes->LLComp))