diff --git a/include/private/gui/LayerState.h b/include/private/gui/LayerState.h
index 2fa6ff9..6ce4cdb 100644
--- a/include/private/gui/LayerState.h
+++ b/include/private/gui/LayerState.h
@@ -39,6 +39,7 @@
     enum {
         eLayerHidden        = 0x01,     // SURFACE_HIDDEN in SurfaceControl.java
         eLayerOpaque        = 0x02,     // SURFACE_OPAQUE
+        eLayerTransparent   = 0x80,     // SURFACE_TRANSPARENT
     };
 
     enum {
@@ -52,6 +53,7 @@
         eLayerStackChanged          = 0x00000080,
         eCropChanged                = 0x00000100,
         eOpacityChanged             = 0x00000200,
+        eTransparencyChanged        = 0x80000000,
     };
 
     layer_state_t()
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 6446926..9e0704a 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -316,6 +316,9 @@
     if (mask & layer_state_t::eLayerHidden) {
         s->what |= layer_state_t::eVisibilityChanged;
     }
+    if (mask & layer_state_t::eLayerTransparent) {
+        s->what |= layer_state_t::eTransparencyChanged;
+    }
     s->flags &= ~mask;
     s->flags |= (flags & mask);
     s->mask |= mask;
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 2598d24..65f9baf 100755
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -1199,7 +1199,8 @@
 
 bool Layer::isVisible() const {
     const Layer::State& s(mDrawingState);
-    return !(s.flags & layer_state_t::eLayerHidden) && s.alpha
+    return !(s.flags & layer_state_t::eLayerHidden) &&
+            !(s.flags & layer_state_t::eLayerTransparent) && s.alpha
             && (mActiveBuffer != NULL || mSidebandStream != NULL);
 }
 
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 41b8435..bb19e6a 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2535,7 +2535,8 @@
                 flags |= eTraversalNeeded;
         }
         if ((what & layer_state_t::eVisibilityChanged) ||
-                (what & layer_state_t::eOpacityChanged)) {
+                (what & layer_state_t::eOpacityChanged) ||
+                (what & layer_state_t::eTransparencyChanged)) {
             // TODO: should we just use an eFlagsChanged for this?
             if (layer->setFlags(s.flags, s.mask))
                 flags |= eTraversalNeeded;