diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp
index 5120a02531..2bcd624095 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintFluidBoundary.cpp
@@ -109,7 +109,7 @@ bool ViewProviderFemConstraintFluidBoundary::setEdit(int ModNum)
 
 //Rendering: Combination of ConstraintFixed and ConstraintForce
 #define ARROWLENGTH (4)
-#define ARROWHEADRADIUS (ARROWLENGTH/3)
+#define ARROWHEADRADIUS (ARROWLENGTH/3.0f)
 #define WIDTH (2)
 #define HEIGHT (1)
 //#define USE_MULTIPLE_COPY  //OvG: MULTICOPY fails to update scaled display on initial drawing - so disable
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp
index 56a80e1104..8b6c3aaf68 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintForce.cpp
@@ -109,7 +109,7 @@ bool ViewProviderFemConstraintForce::setEdit(int ModNum)
 }
 
 #define ARROWLENGTH (4)
-#define ARROWHEADRADIUS (ARROWLENGTH/3)
+#define ARROWHEADRADIUS (ARROWLENGTH/3.0f)
 //#define USE_MULTIPLE_COPY  //OvG: MULTICOPY fails to update scaled arrows on initial drawing - so disable
 
 void ViewProviderFemConstraintForce::updateData(const App::Property* prop)
diff --git a/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp b/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp
index f5fb9f31bc..8d1deefdf3 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemConstraintPressure.cpp
@@ -91,7 +91,7 @@ bool ViewProviderFemConstraintPressure::setEdit(int ModNum)
 }
 
 #define ARROWLENGTH (4)
-#define ARROWHEADRADIUS (ARROWLENGTH/3)
+#define ARROWHEADRADIUS (ARROWLENGTH/3.0f)
 //#define USE_MULTIPLE_COPY //OvG: MULTICOPY fails to update scaled arrows on initial drawing - so disable
 
 void ViewProviderFemConstraintPressure::updateData(const App::Property* prop)