diff --git a/amalgamate/crow_all.h b/amalgamate/crow_all.h
index 41b06ffb1..bc23f58f5 100644
--- a/amalgamate/crow_all.h
+++ b/amalgamate/crow_all.h
@@ -8893,6 +8893,7 @@ namespace crow
                 {401, "HTTP/1.1 401 Unauthorized\r\n"},
                 {403, "HTTP/1.1 403 Forbidden\r\n"},
                 {404, "HTTP/1.1 404 Not Found\r\n"},
+                {422, "HTTP/1.1 422 Unprocessable Entity\r\n"},
 
                 {500, "HTTP/1.1 500 Internal Server Error\r\n"},
                 {501, "HTTP/1.1 501 Not Implemented\r\n"},
diff --git a/include/crow/http_connection.h b/include/crow/http_connection.h
index 96f2d1458..3ef808965 100644
--- a/include/crow/http_connection.h
+++ b/include/crow/http_connection.h
@@ -374,6 +374,7 @@ namespace crow
                 {401, "HTTP/1.1 401 Unauthorized\r\n"},
                 {403, "HTTP/1.1 403 Forbidden\r\n"},
                 {404, "HTTP/1.1 404 Not Found\r\n"},
+                {422, "HTTP/1.1 422 Unprocessable Entity\r\n"},
 
                 {500, "HTTP/1.1 500 Internal Server Error\r\n"},
                 {501, "HTTP/1.1 501 Not Implemented\r\n"},