diff --git a/sync-history.sh b/sync-history.sh
index 488b17c..6b344f1 100755
--- a/sync-history.sh
+++ b/sync-history.sh
@@ -41,7 +41,7 @@ if (( current_time - last_executed_time >= 15 )) || [ "$force_sync" = "-f" ]; th
     fi
 
     source_items=$(read_file $source_file)
-    items=$(echo -e "$source_items\n$new_items" | grep -v '^\:\s[<=>]\{3\}' | sort | uniq)
+    items=$(echo -e "$source_items\n$new_items" | grep -v '^\:\s[<=>]\{3\}' | awk '!x[$0]++')
 
     echo -e "$items" > $source_file
     echo -e "$items" | openssl enc -aes-256-cbc -md sha256 -out "$sync_file" -pass file:"$encryption_key_file" -pbkdf2