diff --git a/src/Mod/Draft/Draft.py b/src/Mod/Draft/Draft.py
index d6a46e0fa65d..f22252bf7dfc 100644
--- a/src/Mod/Draft/Draft.py
+++ b/src/Mod/Draft/Draft.py
@@ -3166,7 +3166,7 @@ def makeWires(objectslist):
             else:
                 # turn to Draft line
                 e = objects[0].Shape.Edges[0]
-                if isinstance(e.Curve,Part.LineSegment):
+                if isinstance(e.Curve,(Part.LineSegment,Part.Line)):
                     result = turnToLine(objects[0])
                     if result: msg(translate("draft", "Found 1 linear object: converting to line\n"))
 
diff --git a/src/Mod/Draft/DraftGeomUtils.py b/src/Mod/Draft/DraftGeomUtils.py
index a45576264e8c..1312a6b73049 100755
--- a/src/Mod/Draft/DraftGeomUtils.py
+++ b/src/Mod/Draft/DraftGeomUtils.py
@@ -105,7 +105,7 @@ def isPtOnEdge(pt,edge) :
 def hasCurves(shape):
     "hasCurve(shape): checks if the given shape has curves"
     for e in shape.Edges:
-            if not isinstance(e.Curve,Part.LineSegment):
+            if not isinstance(e.Curve,(Part.LineSegment,Part.Line)):
                     return True
     return False
 
@@ -159,9 +159,9 @@ def getQuad(face):
 
 def areColinear(e1,e2):
     """areColinear(e1,e2): returns True if both edges are colinear"""
-    if not isinstance(e1.Curve,Part.LineSegment):
+    if not isinstance(e1.Curve,(Part.LineSegment,Part.Line)):
         return False
-    if not isinstance(e2.Curve,Part.LineSegment):
+    if not isinstance(e2.Curve,(Part.LineSegment,Part.Line)):
         return False
     v1 = vec(e1)
     v2 = vec(e2)
@@ -188,7 +188,7 @@ def hasOnlyWires(shape):
 def geomType(edge):
     "returns the type of geom this edge is based on"
     try:
-        if (isinstance(edge.Curve,Part.LineSegment) or isinstance(edge.Curve,Part.Line)):
+        if isinstance(edge.Curve,(Part.LineSegment,Part.Line)):
             return "Line"
         elif isinstance(edge.Curve,Part.Circle):
             return "Circle"