diff --git a/libs/openzap/src/isdn/Q931.c b/libs/openzap/src/isdn/Q931.c
index 0415f39512..12ebde2660 100644
--- a/libs/openzap/src/isdn/Q931.c
+++ b/libs/openzap/src/isdn/Q931.c
@@ -346,7 +346,7 @@ L3INT Q931Rx23(Q931_TrunkInfo_t *pTrunk, L3UCHAR * buf, L3INT Size)
 	/* Protocol Discriminator */
     m->ProtDisc = Mes[IOff++];
 
-    /* CRV */add 
+    /* CRV */
     m->CRVFlag = Mes[IOff + 1] & 0x80;
     m->CRV = Q931Uie_CRV(pTrunk, Mes, m->buf, &IOff, &ISize);