diff --git a/bin/dig/dig.rst b/bin/dig/dig.rst
index 3c899ce..3e9957b 100644
--- a/bin/dig/dig.rst
+++ b/bin/dig/dig.rst
@@ -616,6 +616,17 @@ like to turn off the IDN support for some reason, use parameters
 ``+noidnin`` and ``+noidnout`` or define the IDN_DISABLE environment
 variable.
 
+Return codes
+~~~~~~~~~~~~
+
+``dig`` return codes are:
+
+   0: Everything went well, including things like NXDOMAIN
+   1: Usage error
+   8: Couldn't open batch file
+   9: No reply from server
+   10: Internal error
+
 Files
 ~~~~~