diff --git a/plugins/disk/raid b/plugins/disk/raid
index bb79162b..440fddce 100755
--- a/plugins/disk/raid
+++ b/plugins/disk/raid
@@ -66,6 +66,8 @@ if ( $ARGV[0] and $ARGV[0] eq "config" ) {
 	    }
             if ( $proc ) {
                 $cpct = $proc;
+            } else {
+                $cpct = 0;
             }
 	    print "$dev.value $pct\n";
 	    print $dev, "_rebuild.value $rpct\n";