diff --git a/src/core/execution/ConstructionExecution.ts b/src/core/execution/ConstructionExecution.ts
index eddd3f85c..ad7467366 100644
--- a/src/core/execution/ConstructionExecution.ts
+++ b/src/core/execution/ConstructionExecution.ts
@@ -143,7 +143,10 @@ export class ConstructionExecution implements Execution {
         this.mg.addExecution(new FactoryExecution(player, this.tile));
         break;
       default:
-        throw Error(`unit type ${this.constructionType} not supported`);
+        console.warn(
+          `unit type ${this.constructionType} cannot be constructed`,
+        );
+        break;
     }
   }