diff --git a/src/common/CoreTerminal.ts b/src/common/CoreTerminal.ts
index 4f1c8a57e..72ad7d81e 100644
--- a/src/common/CoreTerminal.ts
+++ b/src/common/CoreTerminal.ts
@@ -124,7 +124,7 @@ export abstract class CoreTerminal extends Disposable implements ICoreTerminal {
     this.register(forwardEvent(this._coreService.onBinary, this._onBinary));
     this.register(this.optionsService.onOptionChange(key => this._updateOptions(key)));
     this.register(this._bufferService.onScroll(event => {
-      this._onScroll.fire(event);
+      this._onScroll.fire({position: this._bufferService.buffer.ydisp, source: ScrollSource.TERMINAL});
       this._dirtyRowService.markRangeDirty(this._bufferService.buffer.scrollTop, this._bufferService.buffer.scrollBottom);
     }));
 
@@ -188,8 +188,8 @@ export abstract class CoreTerminal extends Disposable implements ICoreTerminal {
    * to avoid unwanted events being handled by the viewport when the event was triggered from the
    * viewport originally.
    */
-  public scrollLines(disp: number, suppressScrollEvent?: boolean): void {
-    this._bufferService.scrollLines(disp, suppressScrollEvent);
+  public scrollLines(disp: number, suppressScrollEvent?: boolean, source?: ScrollSource): void {
+    this._bufferService.scrollLines(disp, suppressScrollEvent, source);
   }
 
   /**
diff --git a/src/common/services/BufferService.ts b/src/common/services/BufferService.ts
index 3833bb443..99594d228 100644
--- a/src/common/services/BufferService.ts
+++ b/src/common/services/BufferService.ts
@@ -8,7 +8,7 @@ import { BufferSet } from 'common/buffer/BufferSet';
 import { IBufferSet, IBuffer } from 'common/buffer/Types';
 import { EventEmitter, IEvent } from 'common/EventEmitter';
 import { Disposable } from 'common/Lifecycle';
-import { IAttributeData, IBufferLine } from 'common/Types';
+import { IAttributeData, IBufferLine, ScrollSource } from 'common/Types';
 
 export const MINIMUM_COLS = 2; // Less than 2 can mess with wide chars
 export const MINIMUM_ROWS = 1;
@@ -130,7 +130,7 @@ export class BufferService extends Disposable implements IBufferService {
    * to avoid unwanted events being handled by the viewport when the event was triggered from the
    * viewport originally.
    */
-  public scrollLines(disp: number, suppressScrollEvent?: boolean): void {
+  public scrollLines(disp: number, suppressScrollEvent?: boolean, source?: ScrollSource): void {
     const buffer = this.buffer;
     if (disp < 0) {
       if (buffer.ydisp === 0) {
diff --git a/src/common/services/Services.ts b/src/common/services/Services.ts
index 40c0c1b2d..8b21f100a 100644
--- a/src/common/services/Services.ts
+++ b/src/common/services/Services.ts
@@ -5,7 +5,7 @@
 
 import { IEvent } from 'common/EventEmitter';
 import { IBuffer, IBufferSet } from 'common/buffer/Types';
-import { IDecPrivateModes, ICoreMouseEvent, CoreMouseEncoding, ICoreMouseProtocol, CoreMouseEventType, ICharset, IWindowOptions, IModes, IAttributeData } from 'common/Types';
+import { IDecPrivateModes, ICoreMouseEvent, CoreMouseEncoding, ICoreMouseProtocol, CoreMouseEventType, ICharset, IWindowOptions, IModes, IAttributeData, ScrollSource } from 'common/Types';
 import { createDecorator } from 'common/services/ServiceRegistry';
 
 export const IBufferService = createDecorator<IBufferService>('BufferService');
@@ -23,7 +23,7 @@ export interface IBufferService {
   scrollToBottom(): void;
   scrollToTop(): void;
   scrollToLine(line: number): void;
-  scrollLines(disp: number, suppressScrollEvent?: boolean): void;
+  scrollLines(disp: number, suppressScrollEvent?: boolean, source?: ScrollSource): void;
   scrollPages(pageCount: number): void;
   resize(cols: number, rows: number): void;
   reset(): void;