diff --git a/src/Mod/Part/App/PrimitiveFeature.h b/src/Mod/Part/App/PrimitiveFeature.h
index 287db148ac..6dadd664b2 100644
--- a/src/Mod/Part/App/PrimitiveFeature.h
+++ b/src/Mod/Part/App/PrimitiveFeature.h
@@ -340,7 +340,7 @@ public:
     Spiral();
 
     App::PropertyLength Growth;
-    App::PropertyLength Rotations;
+    App::PropertyQuantityConstraint Rotations;
     App::PropertyLength Radius;
 
     /** @name methods override feature */