diff --git a/src/Corporation/Actions.ts b/src/Corporation/Actions.ts
index 591892659..ab331a7b3 100644
--- a/src/Corporation/Actions.ts
+++ b/src/Corporation/Actions.ts
@@ -260,7 +260,7 @@ export function BulkPurchase(corp: ICorporation, warehouse: Warehouse, material:
   if (isNaN(amt) || amt < 0) {
     throw new Error(`Invalid input amount`);
   }
-  if (amt >= maxAmount) {
+  if (amt > maxAmount) {
     throw new Error(`You do not have enough warehouse size to fit this purchase`);
   }
   const cost = amt * material.bCost;
diff --git a/src/Corporation/ui/modals/PurchaseMaterialModal.tsx b/src/Corporation/ui/modals/PurchaseMaterialModal.tsx
index d0f674ff5..2cd9dd1ea 100644
--- a/src/Corporation/ui/modals/PurchaseMaterialModal.tsx
+++ b/src/Corporation/ui/modals/PurchaseMaterialModal.tsx
@@ -36,7 +36,7 @@ function BulkPurchaseSection(props: IBPProps): React.ReactElement {
     const matSize = MaterialSizes[props.mat.name];
     const maxAmount = (props.warehouse.size - props.warehouse.sizeUsed) / matSize;
 
-    if (parsedAmt * matSize > maxAmount) {
+    if (parsedAmt > maxAmount) {
       setDisabled(true);
       return (
         <>