diff --git a/scene_opengl.cpp b/scene_opengl.cpp
index 2d995cb472..592730a6f6 100644
--- a/scene_opengl.cpp
+++ b/scene_opengl.cpp
@@ -131,7 +131,6 @@ static const int root_buffer_attrs[] =
     GLX_RED_SIZE, 1,
     GLX_GREEN_SIZE, 1,
     GLX_BLUE_SIZE, 1,
-    GLX_ALPHA_SIZE, 1,
     GLX_RENDER_TYPE, GLX_RGBA_BIT,
     GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
     None
@@ -145,7 +144,6 @@ const int drawable_attrs[] =
     GLX_RED_SIZE, 1,
     GLX_GREEN_SIZE, 1,
     GLX_BLUE_SIZE, 1,
-    GLX_ALPHA_SIZE, 1,
     GLX_RENDER_TYPE, GLX_RGBA_BIT,
     GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
     None