diff --git a/darksheet/darksheet.js b/darksheet/darksheet.js
index 77d739f..5286d66 100644
--- a/darksheet/darksheet.js
+++ b/darksheet/darksheet.js
@@ -615,7 +615,7 @@ async function darkSheetSetup(app, html, data) {
 
     let maxSlots = 18;
     let percentage = 0;
-    let STRBONUS = actor.system.abilities.str.value * Math.max(1, Math.min(actor.system.attributes.encumbrance.mod, 8));
+    let STRBONUS = actor.system.abilities.str.mod * Math.max(1, Math.min(actor.system.attributes.encumbrance.mod, 8));
 
     if (actor.flags.darksheet && actor.flags.darksheet.attributes) {
         switch (actor.system.traits.size) {
@@ -1957,4 +1957,4 @@ const fragileItems = [
     "Pen",
     "Parchment",
     "Paper"
-];
\ No newline at end of file
+];