diff --git a/src/browser/decorations/OverviewRulerRenderer.ts b/src/browser/decorations/OverviewRulerRenderer.ts
index 90166960..d5765385 100644
--- a/src/browser/decorations/OverviewRulerRenderer.ts
+++ b/src/browser/decorations/OverviewRulerRenderer.ts
@@ -190,8 +190,6 @@ export class OverviewRulerRenderer extends Disposable {
   }
 
   private _renderColorZone(zone: IColorZone): void {
-    // TODO: Is _decorationElements needed?
-
     this._ctx.fillStyle = zone.color;
     this._ctx.fillRect(
       /* x */ drawX[zone.position || 'full'],
diff --git a/src/common/buffer/Buffer.ts b/src/common/buffer/Buffer.ts
index 7bee6dfd..c929ba2d 100644
--- a/src/common/buffer/Buffer.ts
+++ b/src/common/buffer/Buffer.ts
@@ -32,8 +32,7 @@ export class Buffer implements IBuffer {
   public x: number = 0;
   public scrollBottom: number;
   public scrollTop: number;
-  // TODO: Type me
-  public tabs: any;
+  public tabs: { [column: number]: boolean | undefined } = {};
   public savedY: number = 0;
   public savedX: number = 0;
   public savedCurAttrData = DEFAULT_ATTR_DATA.clone();