diff --git a/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp b/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
index 286aaf8f49..1d337873dd 100644
--- a/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
+++ b/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
@@ -150,6 +150,7 @@ void ElementView::contextMenuEvent (QContextMenuEvent* event)
     CONTEXT_ITEM("Constraint_VerticalDistance","Vertical Distance","Sketcher_ConstrainDistanceY",doVerticalDistance,true)
     CONTEXT_ITEM("Constraint_Length","Length Constraint","Sketcher_ConstrainDistance",doLengthConstraint,true)
     CONTEXT_ITEM("Constraint_Radius","Radius Constraint","Sketcher_ConstrainRadius",doRadiusConstraint,true)
+    CONTEXT_ITEM("Constraint_Diameter","Diameter Constraint","Sketcher_ConstrainDiameter",doDiameterConstraint,true)
     CONTEXT_ITEM("Constraint_InternalAngle","Angle Constraint","Sketcher_ConstrainAngle",doAngleConstraint,true)
   
     menu.addSeparator();
@@ -186,6 +187,7 @@ CONTEXT_MEMBER_DEF("Sketcher_ConstrainParallel",doParallelConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainPerpendicular",doPerpendicularConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainDistance",doLengthConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainRadius",doRadiusConstraint)
+CONTEXT_MEMBER_DEF("Sketcher_ConstrainDiameter",doDiameterConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainAngle",doAngleConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainEqual",doEqualConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainPointOnObject",doPointOnObjectConstraint)
diff --git a/src/Mod/Sketcher/Gui/TaskSketcherElements.h b/src/Mod/Sketcher/Gui/TaskSketcherElements.h
index 7ba50da833..511a2dbb17 100644
--- a/src/Mod/Sketcher/Gui/TaskSketcherElements.h
+++ b/src/Mod/Sketcher/Gui/TaskSketcherElements.h
@@ -68,6 +68,7 @@ protected Q_SLOTS:
     void doPerpendicularConstraint();
     void doLengthConstraint();
     void doRadiusConstraint();
+    void doDiameterConstraint();
     void doAngleConstraint();
     void doEqualConstraint();
     void doPointOnObjectConstraint();