diff --git a/remwharead.1.adoc b/remwharead.1.adoc
index f766094..5dabb24 100644
--- a/remwharead.1.adoc
+++ b/remwharead.1.adoc
@@ -85,6 +85,18 @@ You can use proxy servers with the same environment variables as curl. See
 
 `${XDG_DATA_HOME}` is usually `~/.local/share`.
 
+== ERROR CODES
+
+[options="header",cols=">,<"]
+|==================================================
+| Code | Explanation
+|    1 | Missing options / Argument not understood.
+|    2 | Database connection failed.
+|    3 | File could not be opened.
+|    4 | Could not fetch URI.
+|==================================================
+
+
 == SEE ALSO
 
 *curl*(1)