diff --git a/src/gprs_bssgp_pcu.cpp b/src/gprs_bssgp_pcu.cpp
index 9d02df6..50f10db 100644
--- a/src/gprs_bssgp_pcu.cpp
+++ b/src/gprs_bssgp_pcu.cpp
@@ -520,7 +520,7 @@
 	return 0;
 }
 
-static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci)
+int gprs_bssgp_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci)
 {
 	int rc = 0;
 	switch (event) {
@@ -913,7 +913,7 @@
 
 	the_pcu.bts = bts;
 
-	bssgp_nsi = gprs_ns_instantiate(&sgsn_ns_cb, tall_pcu_ctx);
+	bssgp_nsi = gprs_ns_instantiate(&gprs_bssgp_ns_cb, tall_pcu_ctx);
 	if (!bssgp_nsi) {
 		LOGP(DBSSGP, LOGL_ERROR, "Failed to create NS instance\n");
 		return NULL;
diff --git a/src/gprs_bssgp_pcu.h b/src/gprs_bssgp_pcu.h
index e8ae1a9..f98e719 100644
--- a/src/gprs_bssgp_pcu.h
+++ b/src/gprs_bssgp_pcu.h
@@ -80,6 +80,9 @@
 		uint16_t nsvci, uint16_t bvci, uint16_t mcc, uint16_t mnc, bool mnc_3_digits,
 		uint16_t lac, uint16_t rac, uint16_t cell_id);
 
+int gprs_bssgp_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
+	       struct msgb *msg, uint16_t bvci);
+
 void gprs_bssgp_destroy(void);
 
 struct bssgp_bvc_ctx *gprs_bssgp_pcu_current_bctx(void);