diff --git a/java/src/com/android/inputmethod/latin/WindowCallbackAdapter.java b/java/src/com/android/inputmethod/latin/WindowCallbackAdapter.java
index be9bb2bd8..f1ad8e56d 100644
--- a/java/src/com/android/inputmethod/latin/WindowCallbackAdapter.java
+++ b/java/src/com/android/inputmethod/latin/WindowCallbackAdapter.java
@@ -34,6 +34,13 @@ public class WindowCallbackAdapter implements Window.Callback {
         mPreviousCallback = previousCallback;
     }
 
+    @Override
+    public boolean dispatchGenericMotionEvent(MotionEvent event) {
+        if (mPreviousCallback != null)
+            return mPreviousCallback.dispatchGenericMotionEvent(event);
+        return false;
+    }
+
     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
         if (mPreviousCallback != null)