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
diff --git a/plugins/linux-capture/xcompcap-main.cpp b/plugins/linux-capture/xcompcap-main.cpp
index 0306b68b1..ba7986f09 100644
--- a/plugins/linux-capture/xcompcap-main.cpp
+++ b/plugins/linux-capture/xcompcap-main.cpp
@@ -400,6 +400,7 @@ void XCompcapMain::updateSettings(obs_data_t *settings)
 		GLX_BIND_TO_TEXTURE_RGBA_EXT, GL_TRUE,
 		GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
 		GLX_BIND_TO_TEXTURE_TARGETS_EXT, GLX_TEXTURE_2D_BIT_EXT,
+		GLX_ALPHA_SIZE, 8,
 		GLX_DOUBLEBUFFER, GL_FALSE,
 		None
 	};