diff --git a/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp b/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
index cd7b2075c..985a73d4f 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintFixed.cpp
@@ -62,7 +62,7 @@ using namespace Gui;
 /* TRANSLATOR FemGui::TaskFemConstraintFixed */
 
 TaskFemConstraintFixed::TaskFemConstraintFixed(ViewProviderFemConstraintFixed *ConstraintView,QWidget *parent)
-    : TaskFemConstraint(ConstraintView, parent, "Fem_ConstraintFixed")
+    : TaskFemConstraint(ConstraintView, parent, "fem-constraint-fixed")
 {
     // we need a separate container widget to add all controls to
     proxy = new QWidget(this);
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp b/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
index 38a98183e..0679f2cc9 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintForce.cpp
@@ -62,7 +62,7 @@ using namespace Gui;
 /* TRANSLATOR FemGui::TaskFemConstraintForce */
 
 TaskFemConstraintForce::TaskFemConstraintForce(ViewProviderFemConstraintForce *ConstraintView,QWidget *parent)
-    : TaskFemConstraint(ConstraintView, parent, "Fem_ConstraintForce")
+    : TaskFemConstraint(ConstraintView, parent, "fem-constraint-force")
 {
     // we need a separate container widget to add all controls to
     proxy = new QWidget(this);
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp b/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
index d005fc90f..bbe519e18 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintPressure.cpp
@@ -51,7 +51,7 @@ using namespace Gui;
 /* TRANSLATOR FemGui::TaskFemConstraintPressure */
 
 TaskFemConstraintPressure::TaskFemConstraintPressure(ViewProviderFemConstraintPressure *ConstraintView,QWidget *parent)
-  : TaskFemConstraint(ConstraintView, parent, "Fem_ConstraintPressure")
+  : TaskFemConstraint(ConstraintView, parent, "fem-constraint-pressure")
 {
     proxy = new QWidget(this);
     ui = new Ui_TaskFemConstraintPressure();