diff --git a/chan_capi.c b/chan_capi.c
index fabc556..8153e98 100644
--- a/chan_capi.c
+++ b/chan_capi.c
@@ -891,18 +891,7 @@ static void interface_cleanup(struct capi_pvt *i)
 		i->rtp = NULL;
 	}
 
-	/* some QSIG stuff */
-	if (i->qsigfeat) {
-		i->qsig_data.callmark = 0;
-		i->qsig_data.partner_ch = NULL;
-		i->qsig_data.calltransfer_active = 0;
-		i->qsig_data.calltransfer_onring = 0;
-		if (i->qsig_data.pr_propose_cid)
-			free(i->qsig_data.pr_propose_cid);
-		if (i->qsig_data.pr_propose_pn)
-			free(i->qsig_data.pr_propose_pn);
-		
-	}
+	interface_cleanup_qsig(i);
 
 	i->peer = NULL;	
 	i->owner = NULL;
diff --git a/chan_capi_qsig.h b/chan_capi_qsig.h
index e8ec550..c747ef8 100644
--- a/chan_capi_qsig.h
+++ b/chan_capi_qsig.h
@@ -168,6 +168,8 @@ extern int pbx_capi_qsig_ssct(struct ast_channel *c, char *param);
 extern int pbx_capi_qsig_ct(struct ast_channel *c, char *param);
 extern int pbx_capi_qsig_callmark(struct ast_channel *c, char *param);
 
+extern void interface_cleanup_qsig(struct capi_pvt *i);
+
 /*
  *** ECMA QSIG Functions 
  */
diff --git a/chan_capi_qsig_core.c b/chan_capi_qsig_core.c
index a533a17..0befa4b 100644
--- a/chan_capi_qsig_core.c
+++ b/chan_capi_qsig_core.c
@@ -918,4 +918,21 @@ int pbx_capi_qsig_callmark(struct ast_channel *c, char *param)
 	return 0;
 }
 
+/*
+ * cleanup QSIG stuff on interface
+ */
+void interface_cleanup_qsig(struct capi_pvt *i)
+{
+	if (i->qsigfeat) {
+		i->qsig_data.callmark = 0;
+		i->qsig_data.partner_ch = NULL;
+		i->qsig_data.calltransfer_active = 0;
+		i->qsig_data.calltransfer_onring = 0;
+		if (i->qsig_data.pr_propose_cid)
+			free(i->qsig_data.pr_propose_cid);
+		if (i->qsig_data.pr_propose_pn)
+			free(i->qsig_data.pr_propose_pn);
+		
+	}
+}