diff --git a/src/pasn/pasn_common.h b/src/pasn/pasn_common.h
index e091b8eb4..837ea4fc0 100644
--- a/src/pasn/pasn_common.h
+++ b/src/pasn/pasn_common.h
@@ -151,7 +151,7 @@ int wpas_pasn_start(struct wpas_pasn *pasn, const u8 *own_addr,
 		    const u8 *bssid, int akmp, int cipher, u16 group,
 		    int freq, const u8 *beacon_rsne, u8 beacon_rsne_len,
 		    const u8 *beacon_rsnxe, u8 beacon_rsnxe_len,
-		    struct wpabuf *comeback);
+		    const struct wpabuf *comeback);
 int wpa_pasn_auth_rx(struct wpas_pasn *pasn, const u8 *data, size_t len,
 		     struct wpa_pasn_params_data *pasn_params);
 int wpa_pasn_auth_tx_status(struct wpas_pasn *pasn,
diff --git a/src/pasn/pasn_initiator.c b/src/pasn/pasn_initiator.c
index 4afe7859a..71f412029 100644
--- a/src/pasn/pasn_initiator.c
+++ b/src/pasn/pasn_initiator.c
@@ -859,7 +859,7 @@ int wpas_pasn_start(struct wpas_pasn *pasn, const u8 *own_addr,
 		    const u8 *bssid, int akmp, int cipher, u16 group,
 		    int freq, const u8 *beacon_rsne, u8 beacon_rsne_len,
 		    const u8 *beacon_rsnxe, u8 beacon_rsnxe_len,
-		    struct wpabuf *comeback)
+		    const struct wpabuf *comeback)
 {
 	struct wpabuf *frame;
 	int ret;