diff --git a/index.html b/index.html
index 4f628de..8ccb752 100644
--- a/index.html
+++ b/index.html
@@ -714,6 +714,14 @@
              updateAbilityCostDisplay();
          };
 
+         const subtractPoolPoints = () => {
+             var abilityCost = calculateAbilityCost();
+
+             if (abilityCost === null) return;
+
+             updateAbilityCostDisplay();
+         };
+
          document.addEventListener(
              "DOMContentLoaded",
              () => {
@@ -751,6 +759,7 @@
 
                      loadCharacter(selectedID);
                  });
+                 btnAbilityDo.addEventListener("click", subtractPoolPoints);
 
                  clearSheet();
                  loadCharacterRoster(true);