diff --git a/src/client/app/common/scripts/aiscript.ts b/src/client/app/common/scripts/aiscript.ts
index aea89ff9a3..a3e499fc88 100644
--- a/src/client/app/common/scripts/aiscript.ts
+++ b/src/client/app/common/scripts/aiscript.ts
@@ -316,8 +316,10 @@ export class AiScript {
 
 	@autobind
 	private interpolate(str: string, values: { name: string, value: any }[]) {
-		return str.replace(/\{(.+?)\}/g, match =>
-			(this.getVariableValue(match.slice(1, -1).trim(), values) || '').toString());
+		return str.replace(/\{(.+?)\}/g, match => {
+			const v = this.getVariableValue(match.slice(1, -1).trim(), values);
+			return v == null ? 'NULL' : v.toString();
+		});
 	}
 
 	@autobind
diff --git a/src/client/app/common/views/pages/page/page.vue b/src/client/app/common/views/pages/page/page.vue
index 5ca58a6a4e..307ddf8db7 100644
--- a/src/client/app/common/views/pages/page/page.vue
+++ b/src/client/app/common/views/pages/page/page.vue
@@ -31,6 +31,7 @@ class Script {
 	constructor(aiScript) {
 		this.aiScript = aiScript;
 		this.vars = this.aiScript.evaluateVars();
+		console.log(this.vars);
 	}
 
 	public reEval() {
@@ -38,8 +39,10 @@ class Script {
 	}
 
 	public interpolate(str: string) {
-		return str.replace(/\{(.+?)\}/g, match =>
-			(this.vars.find(x => x.name === match.slice(1, -1).trim()).value || '').toString());
+		return str.replace(/\{(.+?)\}/g, match => {
+			const v = this.vars.find(x => x.name === match.slice(1, -1).trim()).value;
+			return v == null ? 'NULL' : v.toString();
+		});
 	}
 }