diff --git a/libobs-opengl/gl-x11.c b/libobs-opengl/gl-x11.c
index 058db976c..2653cb150 100644
--- a/libobs-opengl/gl-x11.c
+++ b/libobs-opengl/gl-x11.c
@@ -59,6 +59,7 @@ static int ctx_visual_attribs[] = {
 	GLX_STENCIL_SIZE, 0,
 	GLX_DEPTH_SIZE, 0,
 	GLX_BUFFER_SIZE, 32,
+	GLX_ALPHA_SIZE, 8,
 	GLX_DOUBLEBUFFER, true,
 	GLX_X_RENDERABLE, true,
 	None