diff --git a/bash_completion b/bash_completion
index 4aded0d2..27ad6137 100644
--- a/bash_completion
+++ b/bash_completion
@@ -1729,7 +1729,8 @@ complete -F _command -o filenames nohup exec nice eval time ltrace then \
 
 _root_command()
 {
-    PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin _command $1 $2 $3
+    local PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin
+    _command $1 $2 $3
 }
 complete -F _root_command -o filenames sudo fakeroot really gksudo gksu kdesudo