diff --git a/wayland/sway-tiny/post-install b/wayland/sway-tiny/post-install
index 7cae8023..07a76815 100755
--- a/wayland/sway-tiny/post-install
+++ b/wayland/sway-tiny/post-install
@@ -1,7 +1,7 @@
 #!/bin/sh -e
 
 chown root:input "$KISS_ROOT/usr/bin/sway"
-chmod g+s        "$KISS_ROOT"/usr/bin/sway
+chmod g+s        "$KISS_ROOT/usr/bin/sway"
 
 cat <<EOF