diff --git a/config b/config
index 508c52606..e58f11fca 100644
--- a/config
+++ b/config
@@ -5539,7 +5539,7 @@ CONFIG_NOUVEAU_DEBUG=5
 CONFIG_NOUVEAU_DEBUG_DEFAULT=3
 CONFIG_DRM_NOUVEAU_BACKLIGHT=y
 CONFIG_DRM_I915=m
-# CONFIG_DRM_I915_ALPHA_SUPPORT is not set
+CONFIG_DRM_I915_ALPHA_SUPPORT=y
 CONFIG_DRM_I915_CAPTURE_ERROR=y
 CONFIG_DRM_I915_COMPRESS_ERROR=y
 CONFIG_DRM_I915_USERPTR=y