diff --git a/switch-gomobile.sh b/switch-gomobile.sh
index be90765..e7e0d0f 100755
--- a/switch-gomobile.sh
+++ b/switch-gomobile.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
 
-sed -i "s/^\/\/package cwtch/package cwtch/" lib.go
-sed -i "s/^package main/\/\/package main/" lib.go
-sed -i "s/^func main()/\/\/func main()/" lib.go
+perl -pi -e "s/^\/\/package cwtch/package cwtch/" lib.go
+perl -pi -e "s/^package main/\/\/package main/" lib.go
+perl -pi -e "s/^func main()/\/\/func main()/" lib.go