diff --git a/ext/gtk/gtkgstglwidget.c b/ext/gtk/gtkgstglwidget.c
index 186144a1c..54563c36f 100644
--- a/ext/gtk/gtkgstglwidget.c
+++ b/ext/gtk/gtkgstglwidget.c
@@ -173,7 +173,7 @@ _redraw_texture (GtkGstGLWidget * gst_widget, guint tex)
     GstVideoRectangle src, dst, result;
     gint widget_width, widget_height, widget_scale;
 
-    gl->ClearColor (0.0, 0.0, 0.0, 0.0);
+    gl->ClearColor (0.0, 0.0, 0.0, 1.0);
     gl->Clear (GL_COLOR_BUFFER_BIT);
 
     widget_scale = gtk_widget_get_scale_factor ((GtkWidget *) gst_widget);
@@ -221,7 +221,7 @@ _draw_black (GstGLContext * context)
   const GstGLFuncs *gl = context->gl_vtable;
 
   gst_gl_insert_debug_marker (context, "no buffer.  rendering black");
-  gl->ClearColor (0.0, 0.0, 0.0, 0.0);
+  gl->ClearColor (0.0, 0.0, 0.0, 1.0);
   gl->Clear (GL_COLOR_BUFFER_BIT);
 }