diff --git a/openbsc/include/openbsc/gprs_sgsn.h b/openbsc/include/openbsc/gprs_sgsn.h
index 516b6cd..b0d7c32 100644
--- a/openbsc/include/openbsc/gprs_sgsn.h
+++ b/openbsc/include/openbsc/gprs_sgsn.h
@@ -239,9 +239,15 @@
 	struct llist_head list;
 	struct sgsn_ggsn_ctx *ggsn;
 	char *name;
+	char *imsi_prefix;
 	char *description;
 };
 
+struct apn_ctx *sgsn_apn_ctx_find_alloc(const char *name, const char *imsi_prefix);
+void sgsn_apn_ctx_free(struct apn_ctx *actx);
+struct apn_ctx *sgsn_apn_ctx_by_name(const char *name, const char *imsi_prefix);
+struct apn_ctx *sgsn_apn_ctx_match(const char *name, const char *imsi_prefix);
+
 extern struct llist_head sgsn_mm_ctxts;
 extern struct llist_head sgsn_ggsn_ctxts;
 extern struct llist_head sgsn_apn_ctxts;