diff --git a/doc/configuration.txt b/doc/configuration.txt
index 1faee6cab..3f57806ba 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -9689,6 +9689,8 @@ map_<match_type>_<output_type>(<map_file>[,<default_value>])
   input type | match method | output type str | output type int | output type ip
   -----------+--------------+-----------------+-----------------+---------------
     str      | str          | map_str         | map_str_int     | map_str_ip
+  -----------+--------------+-----------------+-----------------+---------------
+    str      | beg          | map_beg         | map_beg_int     | map_end_ip
   -----------+--------------+-----------------+-----------------+---------------
     str      | sub          | map_sub         | map_sub_int     | map_sub_ip
   -----------+--------------+-----------------+-----------------+---------------