1 files changed, 2 insertions, 1 deletions
diff --git a/java/src/main/java/com/google/protobuf/nano/ExtendableMessageNano.java b/java/src/main/java/com/google/protobuf/nano/ExtendableMessageNano.java
index 63c8afc..839f21c 100644
--- a/java/src/main/java/com/google/protobuf/nano/ExtendableMessageNano.java
+++ b/java/src/main/java/com/google/protobuf/nano/ExtendableMessageNano.java
@@ -47,7 +47,7 @@ public abstract class ExtendableMessageNano<M extends ExtendableMessageNano<M>>
     protected List<UnknownFieldData> unknownFieldData;
 
     @Override
-    protected int computeSerializedSize() {
+    public int getSerializedSize() {
         int size = 0;
         int unknownFieldCount = unknownFieldData == null ? 0 : unknownFieldData.size();
         for (int i = 0; i < unknownFieldCount; i++) {
@@ -55,6 +55,7 @@ public abstract class ExtendableMessageNano<M extends ExtendableMessageNano<M>>
             size += CodedOutputByteBufferNano.computeRawVarint32Size(unknownField.tag);
             size += unknownField.bytes.length;
         }
+        cachedSize = size;
         return size;
     }