diff --git a/glamor/glamor_fbo.c b/glamor/glamor_fbo.c
index a531f60..f4f8749 100644
--- a/glamor/glamor_fbo.c
+++ b/glamor/glamor_fbo.c
@@ -352,8 +352,10 @@ _glamor_create_tex(glamor_screen_private *glamor_priv,
     glBindTexture(GL_TEXTURE_2D, tex);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-    if (format == glamor_priv->one_channel_format && format == GL_RED)
+    if (format == glamor_priv->one_channel_format && format == GL_RED) {
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_R, GL_ZERO);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_RED);
+    }
     glamor_priv->suppress_gl_out_of_memory_logging = true;
     glTexImage2D(GL_TEXTURE_2D, 0, format, w, h, 0,
                  format, GL_UNSIGNED_BYTE, NULL);