diff --git a/src/Corporation/Actions.ts b/src/Corporation/Actions.ts
index d044867e8..e69d5bd72 100644
--- a/src/Corporation/Actions.ts
+++ b/src/Corporation/Actions.ts
@@ -233,9 +233,9 @@ export function SetSmartSupply(warehouse: Warehouse, smartSupply: boolean): void
 }
 
 export function SetSmartSupplyUseLeftovers(warehouse: Warehouse, material: Material, useLeftover: boolean): void {
-  if (!Object.keys(warehouse.smartSupplyUseLeftovers).includes(material.name))
+  if (!Object.keys(warehouse.smartSupplyUseLeftovers).includes(material.name.replace(/ /g, "")))
     throw new Error(`Invalid material '${material.name}'`);
-  warehouse.smartSupplyUseLeftovers[material.name] = useLeftover;
+  warehouse.smartSupplyUseLeftovers[material.name.replace(/ /g, "")] = useLeftover;
 }
 
 export function BuyMaterial(material: Material, amt: number): void {
diff --git a/src/Corporation/ui/SmartSupplyModal.tsx b/src/Corporation/ui/SmartSupplyModal.tsx
index b4c031d99..083fb8ed5 100644
--- a/src/Corporation/ui/SmartSupplyModal.tsx
+++ b/src/Corporation/ui/SmartSupplyModal.tsx
@@ -16,7 +16,7 @@ interface ILeftoverProps {
 }
 
 function Leftover(props: ILeftoverProps): React.ReactElement {
-  const [checked, setChecked] = useState(!!props.warehouse.smartSupplyUseLeftovers[props.matName]);
+  const [checked, setChecked] = useState(!!props.warehouse.smartSupplyUseLeftovers[props.matName.replace(/ /g, "")]);
 
   function onChange(event: React.ChangeEvent<HTMLInputElement>): void {
     try {
@@ -33,7 +33,7 @@ function Leftover(props: ILeftoverProps): React.ReactElement {
     <>
       <FormControlLabel
         control={<Switch checked={checked} onChange={onChange} />}
-        label={<Typography>{props.warehouse.materials[props.matName].name}</Typography>}
+        label={<Typography>{props.warehouse.materials[props.matName.replace(/ /g, "")].name}</Typography>}
       />
       <br />
     </>