diff --git a/src/rspro_client_fsm.c b/src/rspro_client_fsm.c
index 91e91eb..f0a9fff 100644
--- a/src/rspro_client_fsm.c
+++ b/src/rspro_client_fsm.c
@@ -64,7 +64,7 @@ static void push_and_send(struct ipa_client_conn *ipa, struct msgb *msg_tx)
 	/* msg_tx is now queued and will be freed. */
 }
 
-int ipa_client_conn_send_rspro(struct ipa_client_conn *ipa, RsproPDU_t *rspro)
+static int ipa_client_conn_send_rspro(struct ipa_client_conn *ipa, RsproPDU_t *rspro)
 {
 	struct msgb *msg = rspro_enc_msg(rspro);
 	if (!msg) {
diff --git a/src/rspro_client_fsm.h b/src/rspro_client_fsm.h
index 7a998dc..b1c14f8 100644
--- a/src/rspro_client_fsm.h
+++ b/src/rspro_client_fsm.h
@@ -44,6 +44,5 @@ struct rspro_server_conn {
 	} bankd;
 };
 
-int ipa_client_conn_send_rspro(struct ipa_client_conn *ipa, RsproPDU_t *rspro);
 int server_conn_send_rspro(struct rspro_server_conn *srvc, RsproPDU_t *rspro);
 int server_conn_fsm_alloc(void *ctx, struct rspro_server_conn *srvc);