diff --git a/ext/alsa/gstalsasrc.c b/ext/alsa/gstalsasrc.c
index e275bf3e7b..a0a9f792d3 100644
--- a/ext/alsa/gstalsasrc.c
+++ b/ext/alsa/gstalsasrc.c
@@ -208,11 +208,13 @@ gst_alsasrc_class_init (GstAlsaSrcClass * klass)
   GstElementClass *gstelement_class;
   GstBaseSrcClass *gstbasesrc_class;
   GstAudioSrcClass *gstaudiosrc_class;
+  GstBaseAudioSrcClass *gstbaseaudiosrc_class;
 
   gobject_class = (GObjectClass *) klass;
   gstelement_class = (GstElementClass *) klass;
   gstbasesrc_class = (GstBaseSrcClass *) klass;
   gstaudiosrc_class = (GstAudioSrcClass *) klass;
+  gstbaseaudiosrc_class = (GstBaseAudioSrcClass *) klass;
 
   gobject_class->finalize = gst_alsasrc_finalize;
   gobject_class->get_property = gst_alsasrc_get_property;