diff --git a/gst-libs/gst/gl/gstglfeature.h b/gst-libs/gst/gl/gstglfeature.h
index 60f1ef6995..4105d6200f 100644
--- a/gst-libs/gst/gl/gstglfeature.h
+++ b/gst-libs/gst/gl/gstglfeature.h
@@ -86,6 +86,9 @@ struct _GstGLFeatureData
   const GstGLFeatureFunction *functions;
 };
 
+gboolean
+gst_gl_check_extension (const char *name, const gchar * ext);
+
 gboolean
 _gst_gl_feature_check (GstGLDisplay *display,
                      const char *driver_prefix,