diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index 34cc6e9..6323906 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -472,6 +472,9 @@
     case HWC_COLOR_FILL:
         value[0] = 1;
         break;
+    case HWC_MAX_WRITEBACK_WIDTH:
+        value[0] = qdutils::MAX_DISPLAY_DIM;
+        break;
     default:
         return -EINVAL;
     }