diff --git a/snmp/zfs-freebsd b/snmp/zfs-freebsd
index 93e1624..f503bef 100644
--- a/snmp/zfs-freebsd
+++ b/snmp/zfs-freebsd
@@ -160,7 +160,7 @@ my $actual_hit_percent = $real_hits / $arc_accesses_total * 100;
 
 my $data_demand_percent = 0;
 if ( $demand_data_total != 0 ){
-	$demand_data_hits / $demand_data_total * 100;
+	$demand_data_hits /= $demand_data_total * 100;
 }
 
 my $data_prefetch_percent=0;