diff --git a/src/Mod/Fem/MechanicalAnalysis.py b/src/Mod/Fem/MechanicalAnalysis.py
index b88e5d57a0..59dd78c175 100644
--- a/src/Mod/Fem/MechanicalAnalysis.py
+++ b/src/Mod/Fem/MechanicalAnalysis.py
@@ -558,7 +558,7 @@ class _ResultControlTaskPanel:
 
         QtGui.qApp.restoreOverrideCursor()
 
-    def showDisplacementClicked(self, bool):
+    def showDisplacementClicked(self, checked):
         QApplication.setOverrideCursor(Qt.WaitCursor)
         self.setDisplacement()
         QtGui.qApp.restoreOverrideCursor()