diff --git a/ext/jack/gstjackaudiosrc.c b/ext/jack/gstjackaudiosrc.c
index da97404fa8..4669bbc5d1 100644
--- a/ext/jack/gstjackaudiosrc.c
+++ b/ext/jack/gstjackaudiosrc.c
@@ -141,7 +141,7 @@ gst_jack_audio_src_free_channels (GstJackAudioSrc * src)
 
 /* ringbuffer abstract base class */
 static GType
-gst_jack_ring_buffer_get_type ()
+gst_jack_ring_buffer_get_type (void)
 {
   static GType ringbuffer_type = 0;