diff --git a/git-gui.sh b/git-gui.sh
index 3f41bd7243..0ad2815d10 100755
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -4143,7 +4143,7 @@ proc do_gitk {revs} {
 	# -- Always start gitk through whatever we were loaded with.  This
 	#    lets us bypass using shell process on Windows systems.
 	#
-	set cmd [info nameofexecutable]
+	set cmd [list [info nameofexecutable]]
 	lappend cmd [gitexec gitk]
 	if {$revs ne {}} {
 		append cmd { }