Index: ps/trunk/binaries/data/mods/public/simulation/ai/common-api/entity.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/ai/common-api/entity.js
+++ ps/trunk/binaries/data/mods/public/simulation/ai/common-api/entity.js
@@ -194,7 +194,12 @@
 
 	"isRepairable": function() { return this.get("Repairable") !== undefined; },
 
-	"getPopulationBonus": function() { return +this.get("Population/Bonus"); },
+	"getPopulationBonus": function() {
+		if (!this.get("Population"))
+			return 0;
+
+		return +this.get("Population/Bonus");
+	},
 
 	"resistanceStrengths": function() {
 		let resistanceTypes = this.get("Resistance");