diff --git a/lib/ControlModel.ts b/lib/ControlModel.ts
index fb3c57b..a0fe793 100644
--- a/lib/ControlModel.ts
+++ b/lib/ControlModel.ts
@@ -6,13 +6,13 @@
  */
 
 export abstract class ControlModel {
-  protected data: Record<string, string|number|boolean>;
+  protected data: Record<string, string|number|boolean> = {};
 
   public abstract get object(): Record<string, string|number|boolean>;
   public abstract set object(obj: Record<string, string|number|boolean>);
 
   public get (key: string): string|number|boolean {
-    return data[key];
+    return this.data[key];
   }
 
   public set (key: string, value: string|number|boolean): void {
diff --git a/lib/DatabaseModel.ts b/lib/DatabaseModel.ts
index 6a910a6..9b4d211 100644
--- a/lib/DatabaseModel.ts
+++ b/lib/DatabaseModel.ts
@@ -16,7 +16,7 @@ export abstract class DatabaseModel {
     this.data.id = val;
   }
 
-  public get object (): Record<string, string|number, boolean> {
+  public get object (): Record<string, string|number|boolean> {
     return this.data;
   }