diff --git a/ChangeLog.txt b/ChangeLog.txt
index 3409196b49..b2ce7b9e37 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -7,6 +7,7 @@ Broker:
other security options. Closes #1149.
- Fix include_dir not sorting config files before loading. This was partially
fixed in 1.5 previously.
+- Improve documentation around the `include_dir` option. Closes #1154.
Library:
- Fix `mosquitto_topic_matches_sub()` not returning MOSQ_ERR_INVAL for
diff --git a/man/mosquitto.conf.5.xml b/man/mosquitto.conf.5.xml
index 60337bf9dc..e3e64c9d2c 100644
--- a/man/mosquitto.conf.5.xml
+++ b/man/mosquitto.conf.5.xml
@@ -349,6 +349,51 @@
file. This option will only be processed from the main
configuration file. The directory specified must not
contain the main configuration file.
+ The configuration files in
+ are loaded in case
+ insensitive alphabetical order.
+
+ Given the files
+ b.conf,
+ A.conf,
+ 01.conf,
+ a.conf, and
+ 00.conf inside
+ , the config files
+ would be loaded in this order:
+
+00.conf
+01.conf
+A.conf
+a.conf
+b.conf
+
+ If this option is used multiple times, then each
+ option is processed
+ completely in the order that they are written in the
+ main configuration file.
+
+ Assuming a directory
+ one.d containing
+ files B.conf and
+ C.conf, and a second
+ directory two.d
+ containing files
+ A.conf and
+ D.conf, and a
+ config:
+
+include_dir one.d
+include_dir two.d
+Then the config files would be loaded in this order:
+
+# files from one.d
+B.conf
+C.conf
+# files from two.d
+A.conf
+D.conf
+
diff --git a/mosquitto.conf b/mosquitto.conf
index d0ec0df7b6..c974eaf39a 100644
--- a/mosquitto.conf
+++ b/mosquitto.conf
@@ -872,6 +872,10 @@
# in the main file. This option will only be processed from the main
# configuration file. The directory specified must not contain the
# main configuration file.
+# Files within include_dir will be loaded sorted in case-insensitive
+# alphabetical order. If this option is given multiple times, all of the files
+# from the first instance will be processed before the next instance. See the
+# man page for examples.
#include_dir
# =================================================================