diff --git a/etc/inc/util.inc b/etc/inc/util.inc
index dd6a81871..e15cdd782 100644
--- a/etc/inc/util.inc
+++ b/etc/inc/util.inc
@@ -2080,7 +2080,8 @@ function get_smart_drive_list() {
 	$disk_list = explode(" ", get_single_sysctl("kern.disks"));
 	foreach ($disk_list as $id => $disk) {
 		// We only want certain kinds of disks for S.M.A.R.T.
-		if (preg_match("/^(ad|da|ada).*[0-9]{1,2}$/", $disk) === FALSE) {
+		// 1 is a match, 0 is no match, False is any problem processing the regex
+		if (preg_match("/^(ad|da|ada).*[0-9]{1,2}$/", $disk) !== 1) {
 			unset($disk_list[$id]);
 		}
 	}