diff --git a/configure.py b/configure.py
index 8bf2bc0a986..17ff53ef645 100755
--- a/configure.py
+++ b/configure.py
@@ -1664,7 +1664,7 @@ def configure_intl(o):
     o['variables']['icu_small'] = b(True)
     locs = set(options.with_icu_locales.split(','))
     locs.add('root')  # must have root
-    o['variables']['icu_locales'] = ','.join(str(loc) for loc in locs)
+    o['variables']['icu_locales'] = ','.join(str(loc) for loc in sorted(locs))
     # We will check a bit later if we can use the canned deps/icu-small
     o['variables']['icu_default_data'] = options.with_icu_default_data_dir or ''
   elif with_intl == 'full-icu':