diff --git a/src/Mod/Sketcher/App/SketchObject.cpp b/src/Mod/Sketcher/App/SketchObject.cpp
index 07e29fc1d8..d8f78d74ed 100644
--- a/src/Mod/Sketcher/App/SketchObject.cpp
+++ b/src/Mod/Sketcher/App/SketchObject.cpp
@@ -4898,7 +4898,7 @@ bool SketchObject::modifyBSplineKnotMultiplicity(int GeoId, int knotIndex, int m
     #endif
 
     if (GeoId < 0 || GeoId > getHighestCurveIndex())
-        THROWMT(Base::ValueError,QT_TRANSLATE_NOOP("Exceptions", "BSpline GeoId is out of bounds."))
+        THROWMT(Base::ValueError,QT_TRANSLATE_NOOP("Exceptions", "BSpline Geometry Index (GeoID) is out of bounds."))
 
     if (multiplicityincr == 0) // no change in multiplicity
         THROWMT(Base::ValueError,QT_TRANSLATE_NOOP("Exceptions", "You are requesting no change in knot multiplicity."))
@@ -4906,7 +4906,7 @@ bool SketchObject::modifyBSplineKnotMultiplicity(int GeoId, int knotIndex, int m
     const Part::Geometry *geo = getGeometry(GeoId);
 
     if(geo->getTypeId() != Part::GeomBSplineCurve::getClassTypeId())
-        THROWMT(Base::TypeError,QT_TRANSLATE_NOOP("Exceptions", "The GeoId provided is not a B-spline curve."))
+        THROWMT(Base::TypeError,QT_TRANSLATE_NOOP("Exceptions", "The Geometry Index (GeoId) provided is not a B-spline curve."))
 
     const Part::GeomBSplineCurve *bsp = static_cast<const Part::GeomBSplineCurve *>(geo);