diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index c3daa64..1a8f243 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -51,6 +51,12 @@
 	LOCAL_CFLAGS += -DTARGET_DISABLE_TRIPLE_BUFFERING
 endif
 
+ifneq ($(TARGET_FORCE_HWC_FOR_VIRTUAL_DISPLAYS),)
+    LOCAL_CFLAGS += -DFORCE_HWC_COPY_FOR_VIRTUAL_DISPLAYS=false
+else
+    LOCAL_CFLAGS += -DFORCE_HWC_COPY_FOR_VIRTUAL_DISPLAYS=true
+endif
+
 ifneq ($(NUM_FRAMEBUFFER_SURFACE_BUFFERS),)
   LOCAL_CFLAGS += -DNUM_FRAMEBUFFER_SURFACE_BUFFERS=$(NUM_FRAMEBUFFER_SURFACE_BUFFERS)
 endif