Update abi.

1 files changed, 1 insertions, 1 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/tensor/functions/Join.java b/vespajlib/src/main/java/com/yahoo/tensor/functions/Join.java
index 14adcc8f18a..fb345264f56 100644
--- a/vespajlib/src/main/java/com/yahoo/tensor/functions/Join.java
+++ b/vespajlib/src/main/java/com/yahoo/tensor/functions/Join.java
@@ -275,7 +275,7 @@ public class Join<NAMETYPE extends Name> extends PrimitiveTensorFunction<NAMETYP
         }
     }
 
-    private static PartialAddress empty = new PartialAddress.Builder(0).build();
+    private static final PartialAddress empty = new PartialAddress.Builder(0).build();
     private static PartialAddress partialAddress(TensorType addressType, TensorAddress address,
                                                  Set<String> retainDimensions, int sharedDimensionSize) {
         PartialAddress.Builder builder = new PartialAddress.Builder(sharedDimensionSize);