diff --git a/src/Mod/Draft/importDXF.py b/src/Mod/Draft/importDXF.py
index 5fc7b4bcba..914b6a55de 100644
--- a/src/Mod/Draft/importDXF.py
+++ b/src/Mod/Draft/importDXF.py
@@ -157,7 +157,7 @@ def getdimheight(style):
                     if a.type == "dimstyle":
                         if rawValue(a,2) == style:
                             return rawValue(a,140)
-    return None
+    return 1
     
 def calcBulge(v1,bulge,v2):
     '''