diff --git a/common/src/main/templates/io/netty/util/collection/KObjectHashMap.template b/common/src/main/templates/io/netty/util/collection/KObjectHashMap.template
index d8aeb1b25c..7db1ceb6c3 100644
--- a/common/src/main/templates/io/netty/util/collection/KObjectHashMap.template
+++ b/common/src/main/templates/io/netty/util/collection/KObjectHashMap.template
@@ -236,7 +236,7 @@ public class @K@ObjectHashMap<V> implements @K@ObjectMap<V> {
 
                     @Override
                     public void remove() {
-                        throw new UnsupportedOperationException();
+                        iter.remove();
                     }
                 };
             }