diff --git a/src/tests/hnb-test-layers.h b/src/tests/hnb-test-layers.h
index 62369f37..62116613 100644
--- a/src/tests/hnb-test-layers.h
+++ b/src/tests/hnb-test-layers.h
@@ -9,10 +9,8 @@ void hnb_test_rua_dt_handle(struct hnb_test *hnb, struct ANY *in);
 void hnb_test_rua_cl_handle(struct hnb_test *hnb, struct ANY *in);
 
 /* RUA calls RANAP */
-void hnb_test_rua_dt_handle_ranap(struct hnb_test *hnb,
-				  struct ranap_message_s *ranap_msg);
-void hnb_test_rua_cl_handle_ranap(struct hnb_test *hnb,
-				  struct ranap_message_s *ranap_msg);
+void hnb_test_rua_dt_handle_ranap(void *priv, struct ranap_message_s *ranap_msg);
+void hnb_test_rua_cl_handle_ranap(void *priv, struct ranap_message_s *ranap_msg);
 
 /* RANAP calls main with actual payload*/
 void hnb_test_nas_rx_dtap(struct hnb_test *hnb, void *data, int len);
diff --git a/src/tests/hnb-test-ranap.c b/src/tests/hnb-test-ranap.c
index 629726b6..fad5b8f4 100644
--- a/src/tests/hnb-test-ranap.c
+++ b/src/tests/hnb-test-ranap.c
@@ -13,13 +13,13 @@ static const char *printstr(OCTET_STRING_t *s)
 	printf(#octet_string_t " = %s\n",\
 	       printstr(&octet_string_t))
 
-void hnb_test_rua_dt_handle_ranap(struct hnb_test *hnb,
-				  struct ranap_message_s *ranap_msg)
+void hnb_test_rua_dt_handle_ranap(void *priv, struct ranap_message_s *ranap_msg)
 {
 	int len;
 	uint8_t *data;
 	RANAP_PermittedIntegrityProtectionAlgorithms_t *algs;
 	RANAP_IntegrityProtectionAlgorithm_t *first_alg;
+	struct hnb_test *hnb = priv;
 
 	printf("rx ranap_msg->procedureCode %d\n",
 	       ranap_msg->procedureCode);
@@ -58,10 +58,10 @@ void hnb_test_rua_dt_handle_ranap(struct hnb_test *hnb,
 	}
 }
 
-void hnb_test_rua_cl_handle_ranap(struct hnb_test *hnb,
-				  struct ranap_message_s *ranap_msg)
+void hnb_test_rua_cl_handle_ranap(void *priv, struct ranap_message_s *ranap_msg)
 {
 	char imsi[16];
+	struct hnb_test *hnb = priv;
 
 	printf("rx ranap_msg->procedureCode %d\n",
 	       ranap_msg->procedureCode);