diff --git a/src/SelectionManager.test.ts b/src/SelectionManager.test.ts
index 77a1612f..538abc91 100644
--- a/src/SelectionManager.test.ts
+++ b/src/SelectionManager.test.ts
@@ -4,13 +4,12 @@
  */
 
 import { assert } from 'chai';
-import { CharMeasure } from './CharMeasure';
 import { SelectionManager, SelectionMode } from './SelectionManager';
 import { SelectionModel } from './SelectionModel';
 import { BufferSet } from './BufferSet';
 import { ITerminal, IBuffer } from './Types';
 import { IBufferLine } from 'core/Types';
-import { MockTerminal } from './TestUtils.test';
+import { MockTerminal, MockCharSizeService } from './TestUtils.test';
 import { BufferLine, CellData } from 'core/buffer/BufferLine';
 
 class TestMockTerminal extends MockTerminal {
@@ -19,10 +18,9 @@ class TestMockTerminal extends MockTerminal {
 
 class TestSelectionManager extends SelectionManager {
   constructor(
-    terminal: ITerminal,
-    charMeasure: CharMeasure
+    terminal: ITerminal
   ) {
-    super(terminal, charMeasure);
+    super(terminal, new MockCharSizeService(10, 10));
   }
 
   public get model(): SelectionModel { return this._model; }
@@ -52,7 +50,7 @@ describe('SelectionManager', () => {
     terminal.buffers = new BufferSet(terminal);
     terminal.buffer = terminal.buffers.active;
     buffer = terminal.buffer;
-    selectionManager = new TestSelectionManager(terminal, null);
+    selectionManager = new TestSelectionManager(terminal);
   });
 
   function stringToRow(text: string): IBufferLine {
diff --git a/src/SelectionManager.ts b/src/SelectionManager.ts
index d0cba71d..0b939562 100644
--- a/src/SelectionManager.ts
+++ b/src/SelectionManager.ts
@@ -7,12 +7,12 @@ import { ITerminal, ISelectionManager, IBuffer, ISelectionRedrawRequestEvent } f
 import { IBufferLine } from 'core/Types';
 import { MouseHelper } from './MouseHelper';
 import * as Browser from 'common/Platform';
-import { CharMeasure } from './CharMeasure';
 import { SelectionModel } from './SelectionModel';
 import { AltClickHandler } from './handlers/AltClickHandler';
 import { CellData } from 'core/buffer/BufferLine';
 import { IDisposable } from 'xterm';
 import { EventEmitter2, IEvent } from 'common/EventEmitter2';
+import { ICharSizeService } from 'ui/services/Services';
 
 /**
  * The number of pixels the mouse needs to be above or below the viewport in
@@ -117,7 +117,7 @@ export class SelectionManager implements ISelectionManager {
 
   constructor(
     private _terminal: ITerminal,
-    private _charMeasure: CharMeasure
+    private _charSizeService: ICharSizeService
   ) {
     this._initListeners();
     this.enable();
@@ -375,7 +375,7 @@ export class SelectionManager implements ISelectionManager {
    */
   private _getMouseEventScrollAmount(event: MouseEvent): number {
     let offset = MouseHelper.getCoordsRelativeToElement(event, this._terminal.screenElement)[1];
-    const terminalHeight = this._terminal.rows * Math.ceil(this._charMeasure.height * this._terminal.options.lineHeight);
+    const terminalHeight = this._terminal.rows * Math.ceil(this._charSizeService.height * this._terminal.options.lineHeight);
     if (offset >= 0 && offset <= terminalHeight) {
       return 0;
     }
diff --git a/src/Terminal.ts b/src/Terminal.ts
index a80bbf52..85594fb7 100644
--- a/src/Terminal.ts
+++ b/src/Terminal.ts
@@ -646,7 +646,7 @@ export class Terminal extends EventEmitter implements ITerminal, IDisposable, II
     this.register(this.charMeasure.onCharSizeChanged(() => this._renderCoordinator.onCharSizeChanged()));
     this.register(this._renderCoordinator.onDimensionsChange(() => this.viewport.syncScrollArea()));
 
-    this.selectionManager = new SelectionManager(this, this.charMeasure);
+    this.selectionManager = new SelectionManager(this, this._charSizeService);
     this.register(this.selectionManager.onSelectionChange(() => this._onSelectionChange.fire()));
     this.register(addDisposableDomListener(this.element, 'mousedown', (e: MouseEvent) => this.selectionManager.onMouseDown(e)));
     this.register(this.selectionManager.onRedrawRequest(e => this._renderCoordinator.onSelectionChanged(e.start, e.end, e.columnSelectMode)));