diff --git a/src/Mod/Measure/Gui/Command.cpp b/src/Mod/Measure/Gui/Command.cpp
index 412f8475f7..7a572250b0 100644
--- a/src/Mod/Measure/Gui/Command.cpp
+++ b/src/Mod/Measure/Gui/Command.cpp
@@ -61,14 +61,15 @@ void StdCmdMeasure::activated(int iMsg)
 }
 
 bool StdCmdMeasure::isActive() {
-    App::Document *doc = App::GetApplication().getActiveDocument();
-    if (!doc || doc->countObjectsOfType(App::GeoFeature::getClassTypeId()) == 0)
+    App::Document* doc = App::GetApplication().getActiveDocument();
+    if (!doc || doc->countObjectsOfType(App::GeoFeature::getClassTypeId()) == 0) {
         return false;
+    }
 
     Gui::MDIView *view = Gui::getMainWindow()->activeWindow();
     if (view && view->isDerivedFrom(Gui::View3DInventor::getClassTypeId())) {
         Gui::View3DInventorViewer *viewer =
-            static_cast<Gui::View3DInventor *>(view)->getViewer();
+            dynamic_cast<Gui::View3DInventor *>(view)->getViewer();
         return !viewer->isEditing();
     }
     return false;