diff --git a/libhwcomposer/hwcomposer.cpp b/libhwcomposer/hwcomposer.cpp
index c21b210..78c15a6 100755
--- a/libhwcomposer/hwcomposer.cpp
+++ b/libhwcomposer/hwcomposer.cpp
@@ -321,6 +321,8 @@ static int drawLayerUsingCopybit(hwc_composer_device_t *dev, hwc_layer_t *layer,
     copybit_device_t *copybit = hwcModule->copybitEngine;
     copybit->set_parameter(copybit, COPYBIT_TRANSFORM, layer->transform);
     copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 0xFF);
+    copybit->set_parameter(copybit, COPYBIT_PREMULTIPLIED_ALPHA,
+                           (layer->blending == HWC_BLENDING_PREMULT)? COPYBIT_ENABLE : COPYBIT_DISABLE);
     int err = copybit->stretch(copybit, &dst, &src, &dstRect, &srcRect, &copybitRegion);
 
     if(err < 0)