1 files changed, 6 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java b/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
index c23bc9bc0..6778c2334 100644
--- a/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
@@ -45,4 +45,10 @@ public class UserHistoryDictionary extends DecayingExpandableBinaryDictionaryBas
     public void cancelAddingUserHistory(final String word0, final String word1) {
         removeBigramDynamically(word0, word1);
     }
+
+    @Override
+    public boolean isValidWord(final String word) {
+        // Strings out of this dictionary should not be considered existing words.
+        return false;
+    }
 }