diff --git a/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java
index 47891c6b7..366f3d4fe 100644
--- a/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java
@@ -44,7 +44,8 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
     private static final String TAG = ContactsBinaryDictionary.class.getSimpleName();
     private static final String NAME = "contacts";
 
-    private static boolean DEBUG = false;
+    private static final boolean DEBUG = false;
+    private static final boolean DEBUG_DUMP = false;
 
     /**
      * Frequency for contacts information into the dictionary
@@ -168,6 +169,10 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
             if (isValidName(name)) {
                 addName(name);
                 ++count;
+            } else {
+                if (DEBUG_DUMP) {
+                    Log.d(TAG, "Invalid name: " + name);
+                }
             }
             cursor.moveToNext();
         }
@@ -204,6 +209,9 @@ public class ContactsBinaryDictionary extends ExpandableBinaryDictionary {
             if (Character.isLetter(name.codePointAt(i))) {
                 int end = getWordEndPosition(name, len, i);
                 String word = name.substring(i, end);
+                if (DEBUG_DUMP) {
+                    Log.d(TAG, "addName word = " + word);
+                }
                 i = end - 1;
                 // Don't add single letter words, possibly confuses
                 // capitalization of i.