diff --git a/Developer-guides.md b/Developer-guides.md
index 6eb1c88..ab2843a 100644
--- a/Developer-guides.md
+++ b/Developer-guides.md
@@ -75,6 +75,12 @@ Unsupported characters in file names will be replaced by `?`. Operations on file
 
 Warning: Saved sessions may no longer be usable when the number of contexts is switched.
 
+#### Compile-in icons
+
+    make O_ICONS=1
+
+More details [here](https://github.com/jarun/nnn/wiki/Advanced-use-cases#file-icons). This option is not compatible with `O_LOC=1`.
+
 ## Static compilation
 
 Install the GPM development library and set the Makefile variable `O_STATIC`.