diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index da3b860..1afe431 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -298,4 +298,10 @@
 
     <!-- Whether device has turbo power charging support -->
     <bool name="config_hasTurboPowerCharger">true</bool>
+
+    <!-- Flag indicating whether the surfaceflinger has limited
+         alpha compositing functionality in hardware.  If set, the window
+         manager will disable alpha trasformation in animations where not
+         strictly needed. -->
+    <bool name="config_sf_limitedAlpha">true</bool>
 </resources>