diff --git a/rest_framework/status.py b/rest_framework/status.py
index 81fe09996..a8398fa37 100644
--- a/rest_framework/status.py
+++ b/rest_framework/status.py
@@ -38,6 +38,7 @@ HTTP_205_RESET_CONTENT = 205
 HTTP_206_PARTIAL_CONTENT = 206
 HTTP_207_MULTI_STATUS = 207
 HTTP_208_ALREADY_REPORTED = 208
+HTTP_226_IM_USED = 226
 HTTP_300_MULTIPLE_CHOICES = 300
 HTTP_301_MOVED_PERMANENTLY = 301
 HTTP_302_FOUND = 302