diff --git a/src/Corporation/Actions.ts b/src/Corporation/Actions.ts
index e69d5bd72..9a510e67d 100644
--- a/src/Corporation/Actions.ts
+++ b/src/Corporation/Actions.ts
@@ -16,6 +16,9 @@ import { IndustryUpgrades } from "./IndustryUpgrades";
 import { ResearchMap } from "./ResearchMap";
 
 export function NewIndustry(corporation: ICorporation, industry: string, name: string): void {
+  if (corporation.divisions.find(({ type }) => industry == type))
+    throw new Error("You have already expanded into this industry!");
+
   for (let i = 0; i < corporation.divisions.length; ++i) {
     if (corporation.divisions[i].name === name) {
       throw new Error("This division name is already in use!");