diff --git a/SC2039.md b/SC2039.md
index 7bff1bd..9daf4ac 100644
--- a/SC2039.md
+++ b/SC2039.md
@@ -94,10 +94,10 @@ POSIX:
 The POSIX standard does not allow for exponents.  However, you can replicate them completely built-in using a POSIX compatible function.  As an example, the `pow` function from [here](http://unix.stackexchange.com/a/7925).
 
 ```sh
-pow () {
-    set "$1" "$2" 1
+pow() {
+    set -- "$1" "$2" 1
     while [ "$2" -gt 0 ]; do
-      set "$1" $(($2-1)) $(($1*$3))
+      set -- "$1" $(($2-1)) $(($1*$3))
     done
     # %d = signed decimal, %u = unsigned decimal
     # Either should overflow to 0