diff --git a/cloud/azure/database/mysql/mode/storage.pm b/cloud/azure/database/mysql/mode/storage.pm
index c8e323642..8596b89fc 100644
--- a/cloud/azure/database/mysql/mode/storage.pm
+++ b/cloud/azure/database/mysql/mode/storage.pm
@@ -146,10 +146,10 @@ sub check_options {
 
     my $metrics_mapping_transformed;
     foreach my $metric_type (@{$resource_mapping->{$resource_type}}) {
-        $self->{metrics_mapping_transformed}->{$metric_type} = $self->{metrics_mapping}->{$metric_type};
+        $metrics_mapping_transformed->{$metric_type} = $self->{metrics_mapping}->{$metric_type};
     }
 
-    foreach my $metric (keys %{$self->{metrics_mapping_transformed}}) {
+    foreach my $metric (keys %{$metrics_mapping_transformed}) {
         next if (defined($self->{option_results}->{filter_metric}) && $self->{option_results}->{filter_metric} ne ''
             && $metric !~ /$self->{option_results}->{filter_metric}/);
         push @{$self->{az_metrics}}, $metric;