diff --git a/src/widgets/widgets/qabstractspinbox.h b/src/widgets/widgets/qabstractspinbox.h
index 552c51fc9d..87d46c7326 100644
--- a/src/widgets/widgets/qabstractspinbox.h
+++ b/src/widgets/widgets/qabstractspinbox.h
@@ -132,6 +132,8 @@ public:
         DefaultStepType,
         AdaptiveDecimalStepType
     };
+    Q_ENUM(StepType)
+
 public Q_SLOTS:
     void stepUp();
     void stepDown();