diff --git a/src/Mod/Draft/DraftGeomUtils.py b/src/Mod/Draft/DraftGeomUtils.py
index ac54097671..d125af80e9 100644
--- a/src/Mod/Draft/DraftGeomUtils.py
+++ b/src/Mod/Draft/DraftGeomUtils.py
@@ -1116,9 +1116,18 @@ def offset(edge,vector,trim=False):
 
 def isReallyClosed(wire):
     "checks if a wire is really closed"
-    if len(wire.Edges) == len(wire.Vertexes): return True
-    v1 = wire.Vertexes[0].Point
-    v2 = wire.Vertexes[-1].Point
+
+    ## TODO yet to find out why not use wire.isClosed() direct, in isReallyClosed(wire)
+
+    # Remark out below - Found not true if a vertex is used again in a wire in sketch ( e.g. wire with shape like 'd', 'b', 'g'... )
+    #if len(wire.Edges) == len(wire.Vertexes): return True
+
+    # Found cases where Wire[-1] are not 'last' vertexes (e.g. Part.Wire( Part.__sortEdges__( <Rectangle Geometries>.toShape() ) )
+    # aboveWire.isClosed() == True, but Wire[-1] are the 3rd vertex for the rectangle
+    # - use Edges[i].Vertexes[0/1] instead
+    length = len(wire.Edges)
+    v1 = wire.Edges[0].Vertexes[0].Point					#v1 = wire.Vertexes[0].Point
+    v2 = wire.Edges[length-1].Vertexes[1].Point					#v2 = wire.Vertexes[-1].Point
     if DraftVecUtils.equals(v1,v2): return True
     return False