diff --git a/sandbox/generate_logfile_data_inventory.pl b/sandbox/generate_logfile_data_inventory.pl
index bf2324a52e..5e166d0190 100644
--- a/sandbox/generate_logfile_data_inventory.pl
+++ b/sandbox/generate_logfile_data_inventory.pl
@@ -659,7 +659,7 @@ sub _create_mock {
 #}
 
 sub _generate_combinations {
-    my @arrays = grep @$_, @_;
+    my @arrays = grep { @{$_} }, @_;
     my $min = @arrays;
     my @current = ([]);
     for my $array (@arrays) {