diff --git a/StructureSpawnClass.js b/StructureSpawnClass.js
index 2e25a1a..e6796ee 100644
--- a/StructureSpawnClass.js
+++ b/StructureSpawnClass.js
@@ -12,7 +12,8 @@ class _StructureSpawn extends StructureSpawn {
     
     tick(){
 		if(!this.memory.init) this.begin();
-		if(this.store.getUsedCapacity(RESOURCE_ENERGY) < 300) return; 
+		if(Game.time%300) return;
+		if(this.room.energyAvailable < 300) return;
 		const job = this.room.memory.vacancies.pop();
 		if(job){
 			const name = getJobName(job.role);