diff --git a/django_assets/glob.py b/django_assets/glob.py
index 66a9531..4d58155 100644
--- a/django_assets/glob.py
+++ b/django_assets/glob.py
@@ -121,7 +121,7 @@ def translate(pat):
                 res = '%s([%s])' % (res, stuff)
         else:
             res = res + re.escape(c)
-    return res + '\Z(?ms)'
+    return res + r'\Z(?ms)'
 
 
 """Filename globbing utility."""