diff --git a/Recursiveness.md b/Recursiveness.md
index 42610b6..c73dbfb 100644
--- a/Recursiveness.md
+++ b/Recursiveness.md
@@ -16,7 +16,7 @@ To check files with one of multiple extensions:
 
 ```
 # Bash 4+
-shopt -s globstar
+shopt -s globstar nullglob
 shellcheck /path/to/scripts/**/*.{sh,bash,ksh}
 
 # POSIX