diff --git a/error_codes.md b/error_codes.md
index b807ce9..496b764 100644
--- a/error_codes.md
+++ b/error_codes.md
@@ -31,4 +31,4 @@
 [10]: 10.md
 [11]: 11.md
 [12]: 12.md
-[19]: 19.md
+[20]: 20.md