diff --git a/Developer-guides.md b/Developer-guides.md
index 6ec80f1..9fa6b84 100644
--- a/Developer-guides.md
+++ b/Developer-guides.md
@@ -109,12 +109,6 @@ Warning: Saved sessions may no longer be usable when the number of contexts is s
 
 Discard filter key when there's no match.
 
-#### Show file information
-
-    make O_FILEINFO=1
-
-Show file information using `file -b` in the information bar.
-
 ## Static compilation
 
 Install the GPM development library and set the Makefile variable `O_STATIC`.