diff --git a/libs/ui/Surface.cpp b/libs/ui/Surface.cpp
index c73909f..4abb7f6 100644
--- a/libs/ui/Surface.cpp
+++ b/libs/ui/Surface.cpp
@@ -620,6 +620,9 @@
         case NATIVE_WINDOW_HEIGHT:
             *value = int(mHeight);
             return NO_ERROR;
+        case NATIVE_WINDOW_FORMAT:
+            *value = int(mFormat);
+            return NO_ERROR;
     }
     return BAD_VALUE;
 }