--- a/python/compare-locales/mach_commands.py
+++ b/python/compare-locales/mach_commands.py
@@ -73,9 +73,9 @@ class CompareLocales(MachCommandBase):
                     'locales', 'merge-dir-{ab_CD}'
                 )
             except Exception:
                 pass
 
         app = EnumerateApp(l10n_ini, l10n_base, locales)
         observer = compareApp(app, merge_stage=merge_dir,
                               clobber=True)
-        print(observer.serialize().encode('utf-8', 'replace'))
+        print(observer.serialize())