diff --git a/syntax/sh.nanorc b/syntax/sh.nanorc
index bf15d44a..cebea36e 100644
--- a/syntax/sh.nanorc
+++ b/syntax/sh.nanorc
@@ -1,7 +1,7 @@
 ## Syntax highlighting for Bourne shell scripts.
 
 syntax sh "(\.sh|(^|/|\.)(a|ba|c|da|k|mk|pdk|tc|z)sh(rc|_profile)?|(/etc/|(^|/)\.)profile)$"
-header "^#!.*/((env[[:blank:]]+)?((a|ba|c|da|k|mk|pdk|tc|z)?sh)|busybox[[:blank:]]+sh|openrc-run|runscript)\>"
+header "^#!.*/(((env|busybox)[[:blank:]]+)?(a|ba|c|da|k|mk|pdk|tc|z)?sh|openrc-run|runscript)\>"
 header "-\*-.*shell-script.*-\*-"
 magic "(POSIX|Bourne-Again) shell script.*text"
 comment "#"