diff --git a/README.md b/README.md
index 519e054..304ecd2 100644
--- a/README.md
+++ b/README.md
@@ -40,5 +40,6 @@ public enum PatcherExitCode
     NoPatchFolder  = 12, // no patch folder was found during patching (patch client only)
     MissingFile    = 13, // a matching file could not be found during patching (patch client only) 
     MissingDir     = 14  // a directory could not be found during patch generation (source/target/output) (patch generator only)
+    PatchFailed    = 15  // a patch file failed (patch client only)
 }
 ```
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