diff --git a/gst-libs/gst/gl/gstgldisplay.c b/gst-libs/gst/gl/gstgldisplay.c
index 27d7310abf..72bc5aa16c 100644
--- a/gst-libs/gst/gl/gstgldisplay.c
+++ b/gst-libs/gst/gl/gstgldisplay.c
@@ -183,7 +183,7 @@ gst_gl_display_init (GstGLDisplay *display, GstGLDisplayClass *klass)
   display->upload_intex_v = 0;
   display->upload_width = 0;
   display->upload_height = 0;
-  display->upload_video_format = 0;
+  display->upload_video_format = GST_VIDEO_FORMAT_RGBx;
   display->upload_colorspace_conversion = GST_GL_DISPLAY_CONVERSION_MESA;
   display->upload_data_width = 0;
   display->upload_data_height = 0;