diff --git a/src/ranap_msg_factory.c b/src/ranap_msg_factory.c
index 51f923c..634e2a1 100644
--- a/src/ranap_msg_factory.c
+++ b/src/ranap_msg_factory.c
@@ -40,7 +40,7 @@
 
 /*! \brief generate RANAP RESET message */
 struct msgb *ranap_new_msg_reset(RANAP_CN_DomainIndicator_t domain,
-				 RANAP_Cause_t *cause)
+				 const RANAP_Cause_t *cause)
 {
 	RANAP_ResetIEs_t ies;
 	RANAP_Reset_t out;
diff --git a/src/ranap_msg_factory.h b/src/ranap_msg_factory.h
index 810bee5..2344b05 100644
--- a/src/ranap_msg_factory.h
+++ b/src/ranap_msg_factory.h
@@ -28,7 +28,7 @@
 
 /*! \brief generate RANAP RESET message */
 struct msgb *ranap_new_msg_reset(RANAP_CN_DomainIndicator_t domain,
-				 RANAP_Cause_t *cause);
+				 const RANAP_Cause_t *cause);
 
 /*! \brief generate RANAP RESET ACK message */
 struct msgb *ranap_new_msg_reset_ack(RANAP_CN_DomainIndicator_t domain,