diff --git a/scripts/generateSingleHeader.py b/scripts/generateSingleHeader.py
index 22b882ab..31033d68 100755
--- a/scripts/generateSingleHeader.py
+++ b/scripts/generateSingleHeader.py
@@ -46,7 +46,7 @@ def generate(v):
     outDir = os.path.dirname(outputPath)
     if not os.path.exists(outDir):
         os.makedirs(outDir)
-    out = io.open( outputPath, 'w', newline='\n')
+    out = io.open( outputPath, 'w', newline='\n', encoding='utf-8')
 
     def write( line ):
         if globals['includeImpl'] or globals['implIfDefs'] == -1: