diff --git a/plugins/docker/docker_cpu b/plugins/docker/docker_cpu
index 9194edc6..62c5d080 100755
--- a/plugins/docker/docker_cpu
+++ b/plugins/docker/docker_cpu
@@ -86,9 +86,9 @@ for my $i (1 .. $#containers)
 if (defined $ARGV[0] and $ARGV[0] eq "config")
 {
    my $nanoSecondsInSecond=1000000000;
-   my $graphlimit = $result[0]{'ncpu'};
+   my $graphlimit = 1;
    foreach(@result){
-      if ($$_{'ncpu'} > $graphlimit){
+      if ($$_{'ncpu'} || 1 > $graphlimit){
          $graphlimit = $$_{'ncpu'};
       }
    }