diff --git a/java/src/com/android/inputmethod/latin/UserHistoryDictIOUtils.java b/java/src/com/android/inputmethod/latin/UserHistoryDictIOUtils.java
index 550e4e58b..ddbc02363 100644
--- a/java/src/com/android/inputmethod/latin/UserHistoryDictIOUtils.java
+++ b/java/src/com/android/inputmethod/latin/UserHistoryDictIOUtils.java
@@ -96,6 +96,11 @@ public class UserHistoryDictIOUtils {
         public void put(final byte b) {
             mBuffer[mPosition++] = b;
         }
+
+        @Override
+        public int limit() {
+            return mBuffer.length;
+        }
     }
 
     /**
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
index 72d12299b..56b29ec79 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
@@ -63,6 +63,7 @@ public class BinaryDictInputOutput {
         public int position();
         public void position(int newPosition);
         public void put(final byte b);
+        public int limit();
     }
 
     public static final class ByteBufferWrapper implements FusionDictionaryBufferInterface {
@@ -107,6 +108,11 @@ public class BinaryDictInputOutput {
         public void put(final byte b) {
             mBuffer.put(b);
         }
+
+        @Override
+        public int limit() {
+            return mBuffer.limit();
+        }
     }
 
     /**