diff --git a/hash-files b/hash-files
index 113c796..0624d1a 100755
--- a/hash-files
+++ b/hash-files
@@ -26,6 +26,7 @@ write_log () {
 
 mdls_per_file () {
 	file=$1
+	unset mdls_properties
 	for line in $(mdls $file); do
 		old_IFS=$IFS
 		unset IFS