diff --git a/coreapi/ringtoneplayer_ios.h b/coreapi/ringtoneplayer_ios.h
index 37aa2b22e..fce0a16dc 100644
--- a/coreapi/ringtoneplayer_ios.h
+++ b/coreapi/ringtoneplayer_ios.h
@@ -24,7 +24,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 extern "C" {
 #endif
 
-LinphoneRingtonePlayer* linphone_ringtoneplayer_ios_new();
+LinphoneRingtonePlayer* linphone_ringtoneplayer_ios_new(void);
 void linphone_ringtoneplayer_ios_destroy(LinphoneRingtonePlayer* rp);
 int linphone_ringtoneplayer_ios_start_with_cb(LinphoneRingtonePlayer* rp, const char* ringtone, int loop_pause_ms, LinphoneRingtonePlayerFunc end_of_ringtone, void * user_data);
 bool_t linphone_ringtoneplayer_ios_is_started(LinphoneRingtonePlayer* rp);