diff --git a/README.asciidoc b/README.asciidoc
index a20530a8..98e7fa95 100644
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -620,6 +620,8 @@ Some commands take an exclamation mark (`!`), which can be used to force
 the execution of the command (i.e. to quit a modified buffer, the
 command `q!` has to be used).
 
+ * `doc <topic>`: display documentation about a topic. The completion list
+     displays the available topics.
  * `cd <directory>`: change the current directory to the one passed
  * `e[dit][!] <filename> [<line> [<column>]]`: open buffer on file, go to given
      line and column. If file is already opened, just switch to this file.
diff --git a/doc/manpages/commands.asciidoc b/doc/manpages/commands.asciidoc
index c52491b8..fcb12def 100644
--- a/doc/manpages/commands.asciidoc
+++ b/doc/manpages/commands.asciidoc
@@ -12,6 +12,10 @@ Some commands take an exclamation mark (*!*), which can be used to force
 the execution of the command (i.e. to quit a modified buffer, the
 command *q!* has to be used).
 
+*doc* <topic>::
+	display documentation about a topic. The completion list displays the
+	available topics
+
 *cd* <directory>::
 	change the current directory to the one passed