diff --git a/src/main/java/org/apache/commons/collections4/list/GrowthList.java b/src/main/java/org/apache/commons/collections4/list/GrowthList.java
index b81802e0c..ca329f985 100644
--- a/src/main/java/org/apache/commons/collections4/list/GrowthList.java
+++ b/src/main/java/org/apache/commons/collections4/list/GrowthList.java
@@ -153,7 +153,7 @@ public class GrowthList<E> extends AbstractSerializableListDecorator<E> {
             decorated().addAll(Collections.<E>nCopies(index - size, null));
             result = true;
         }
-        return decorated().addAll(index, coll) | result;
+        return decorated().addAll(index, coll) || result;
     }
 
     //-----------------------------------------------------------------------