diff --git a/scripts/msgfmt.py b/scripts/msgfmt.py
index 09518dd48..bcb7aff51 100644
--- a/scripts/msgfmt.py
+++ b/scripts/msgfmt.py
@@ -86,7 +86,10 @@ def generate():
                          7*4,               # start of key index
                          7*4+len(keys)*8,   # start of value index
                          0, 0)              # size and offset of hash table
-    output += array.array("i", offsets).tostring()
+    try:
+        output += array.array("i", offsets).tostring()
+    except AttributeError:
+        output += array.array("i", offsets).tobytes()
     output += ids
     output += strs
     return output