diff --git a/src/Mod/Robot/App/kdl_cp/frames.inl b/src/Mod/Robot/App/kdl_cp/frames.inl
index e9eccc3cbe..d83e3aa69a 100644
--- a/src/Mod/Robot/App/kdl_cp/frames.inl
+++ b/src/Mod/Robot/App/kdl_cp/frames.inl
@@ -824,7 +824,7 @@ IMETHOD void Vector2::Set3DYZ(const Vector& v)
     data[1]=v(2);
 }
 IMETHOD void Vector2::Set3DZX(const Vector& v)
-// projects v in its XY plane, and and sets *this to these values
+// projects v in its XY plane, and sets *this to these values
 {
     data[0]=v(2);
     data[1]=v(0);