diff --git a/gst-libs/gst/gl/gstglupload.c b/gst-libs/gst/gl/gstglupload.c
index 438f62f1c6..1e4c65e59a 100644
--- a/gst-libs/gst/gl/gstglupload.c
+++ b/gst-libs/gst/gl/gstglupload.c
@@ -566,7 +566,7 @@ _gst_gl_upload_perform_with_data_unlocked (GstGLUpload * upload,
 }
 
 /* Called in the gl thread */
-void
+static void
 _init_upload (GstGLContext * context, GstGLUpload * upload)
 {
   GstGLFuncs *gl;