diff --git a/bash/bashrc/rbashrc b/bash/bashrc/rbashrc
index 3345681..4341391 100644
--- a/bash/bashrc/rbashrc
+++ b/bash/bashrc/rbashrc
@@ -111,7 +111,8 @@ function __cacheDownload {
 }
 
 function __uuid {
-    if [ -x uuidgen ]; then
+    which -s uuidgen
+    if [ $? -eq 0 ]; then
         uuidgen
     else
         cat /proc/sys/kernel/random/uuid