diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c0015c65..2668ef840 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ n/a
 
 - Added `NormalizedInMemoryCache` as a new cache option. @micimize
 - Fixed `Mutation` calling `onCompleted` for loading state. @rafaelring
+- Fix type annotations. @HofmannZ
 - Fixed http versions. @HofmannZ
 
 #### Docs
diff --git a/lib/src/widgets/mutation.dart b/lib/src/widgets/mutation.dart
index cf7bd086e..9b6ddfa9f 100644
--- a/lib/src/widgets/mutation.dart
+++ b/lib/src/widgets/mutation.dart
@@ -48,7 +48,7 @@ class MutationState extends State<Mutation> {
           if (!result.loading) {
             widget.onCompleted(result);
             onCompleteSubscription.cancel();
-          }        
+          }
         },
       );
     }