diff --git a/src/ripple_data/protocol/SerializedTypes.h b/src/ripple_data/protocol/SerializedTypes.h
index 95bf35704..48a25e029 100644
--- a/src/ripple_data/protocol/SerializedTypes.h
+++ b/src/ripple_data/protocol/SerializedTypes.h
@@ -566,7 +566,7 @@ public:
     }
     bool isLegalNet () const
     {
-        return !mIsNative || (mValue < cMaxNativeN);
+        return !mIsNative || (mValue <= cMaxNativeN);
     }
     operator bool () const
     {