diff --git a/src/js/utilsFC.js b/src/js/utilsFC.js
index 0577968a447377bdf277d6fe8b99faf9129d4950..d92391f574d01166e60e7374ac91f7d58353f540 100644
--- a/src/js/utilsFC.js
+++ b/src/js/utilsFC.js
@@ -1307,7 +1307,7 @@ globalThis.massFormat = function(s) {
 	if (!s) {
 		s = 0;
 	}
-	if (s >= 1000) {
+	if (Math.abs(s) >= 1000) {
 		s = Math.trunc(s / 1000);
 		if (s !== 1) {
 			return `${num(s)} tons`;