diff --git a/Developer-guides.md b/Developer-guides.md
index 4e57c4a..6adb1d7 100644
--- a/Developer-guides.md
+++ b/Developer-guides.md
@@ -84,7 +84,7 @@ Unsupported characters in file names will be replaced by `?`. Operations on file
 
     make O_CKBOARD=1
 
-Use checker board (stipple) instead of `>` as indicator in detail mode.
+Use checker board (stipple `▒`) instead of `>` as indicator in detail mode.
 
 #### Compile-in 8 contexts