diff --git a/lib/wind/generate.py b/lib/wind/generate.py
index 91dc151ce..0a32fcd4d 100644
--- a/lib/wind/generate.py
+++ b/lib/wind/generate.py
@@ -64,7 +64,7 @@ class Header(GeneratedFile) :
         guardTrans = string.maketrans('-.', '__')
     def makeGuard(self) :
         """Return a name to be used as ifdef guard"""
-        return string.upper(string.translate(self.name, self.guardTrans))
+        return self.name.translate(self.guardTrans).upper()
 
     def __init__(self, name) :
         "Create a new Header with name"