diff --git a/sh/shell/bash.sh b/sh/shell/bash.sh
index 400f83c..20529c0 100644
--- a/sh/shell/bash.sh
+++ b/sh/shell/bash.sh
@@ -2,23 +2,29 @@
 # │ shell │ bash │
 # ╰───────┴──────╯
 
-if [ "${RWX_SHELL}" = "bash" ]; then
+# based on currently running shell
+case "${RWX_SHELL}" in
+	"bash") ;;
+	# skip illegal syntax to come
+	*) return ;;
+esac
 
 # shellcheck disable=SC3033
 ..() {
 	cd ..
 }
+
 # shellcheck disable=SC3033
 ...() {
 	cd ../..
 }
+
 # shellcheck disable=SC3033
 ....() {
 	cd ../../..
 }
+
 # shellcheck disable=SC3033
 .....() {
 	cd ../../../..
 }
-
-fi