diff --git a/modules/utility/dir.lib b/modules/utility/dir.lib
index c4b2840..c1c5e4e 100644
--- a/modules/utility/dir.lib
+++ b/modules/utility/dir.lib
@@ -14,7 +14,7 @@ isDir() {
 
 function dir_copy () {
 
-  [[ ! $(which rsync) ]] && { echo rsync must be installed to use this function; return 5; }
+  [[ ! $(command -v rsync) ]] && { echo rsync must be installed to use this function; return 5; }
   module_load confirm
   local usesudo;local cmd;local src;local noconfirm;local merge