diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index a662b25..5cde7fb 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -71,9 +71,12 @@
     // commits the list
     status_t commit() const;
 
-    // release hardware resources
+    // release hardware resources and blank screen
     status_t release() const;
 
+    // acquire hardware resources and unblank screen
+    status_t acquire() const;
+
     // create a work list for numLayers layer. sets HWC_GEOMETRY_CHANGED.
     status_t createWorkList(size_t numLayers);