diff --git a/flink-core/src/main/java/org/apache/flink/api/common/accumulators/AccumulatorHelper.java b/flink-core/src/main/java/org/apache/flink/api/common/accumulators/AccumulatorHelper.java
index 1533b3d717723..e2414aae99771 100644
--- a/flink-core/src/main/java/org/apache/flink/api/common/accumulators/AccumulatorHelper.java
+++ b/flink-core/src/main/java/org/apache/flink/api/common/accumulators/AccumulatorHelper.java
@@ -145,7 +145,7 @@ private static <R> OptionalFailure<R> wrapUnchecked(String name, Supplier<R> sup
                     try {
                         return supplier.get();
                     } catch (RuntimeException ex) {
-                        LOG.error("Unexpected error while handling accumulator [" + name + "]", ex);
+                        LOG.error("Unexpected error while handling accumulator [{}]", name, ex);
                         throw new FlinkException(ex);
                     }
                 });