diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 46dc414bfb..d8e2f4ea27 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2011-09-08  Doug Evans  <dje@google.com>
+
+	* cli/cli-decode.c (add_cmd): Add comment.
+
 2011-09-08  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	PR breakpoints/12435
diff --git a/gdb/cli/cli-decode.c b/gdb/cli/cli-decode.c
index 622ee68678..95996e8ecc 100644
--- a/gdb/cli/cli-decode.c
+++ b/gdb/cli/cli-decode.c
@@ -128,6 +128,7 @@ set_cmd_completer (struct cmd_list_element *cmd,
 
 
 /* Add element named NAME.
+   Space for NAME and DOC must be allocated by the caller.
    CLASS is the top level category into which commands are broken down
    for "help" purposes.
    FUN should be the function to execute the command;