diff --git a/plugins/disk/md_iostat_ b/plugins/disk/md_iostat_
index cc7f8928..c62a94fe 100755
--- a/plugins/disk/md_iostat_
+++ b/plugins/disk/md_iostat_
@@ -130,7 +130,7 @@ while (<MD>) {
 
 # Remove unwanted things like raid device number, partition number
 # and sort nicely.
-@devs = sort by_dev map { s/\d*\[.*\]$//; $_; } @devs;
+@devs = sort by_dev map { s/\d*\[.*$//; $_; } @devs;
 
 # Insert the raid device into the mix.
 unshift(@devs,$md);