diff --git a/src/vs/workbench/common/editor/untitledEditorModel.ts b/src/vs/workbench/common/editor/untitledEditorModel.ts
index 89903fd66b7..17d7ff337a0 100644
--- a/src/vs/workbench/common/editor/untitledEditorModel.ts
+++ b/src/vs/workbench/common/editor/untitledEditorModel.ts
@@ -176,7 +176,7 @@ export class UntitledEditorModel extends BaseTextEditorModel implements IEncodin
 				this.configuredEncoding = configuration && configuration.files && configuration.files.encoding;
 
 				// Listen to content changes
-				this.textModelChangeListener = this.textEditorModel.onDidChangeContent(e => this.onModelContentChanged());
+				this.textModelChangeListener = this.textEditorModel.onDidChangeContent(() => this.onModelContentChanged());
 
 				return model;
 			});
diff --git a/src/vs/workbench/parts/preferences/browser/keybindingsEditorContribution.ts b/src/vs/workbench/parts/preferences/browser/keybindingsEditorContribution.ts
index ed4b39ebc17..8f1daf2c030 100644
--- a/src/vs/workbench/parts/preferences/browser/keybindingsEditorContribution.ts
+++ b/src/vs/workbench/parts/preferences/browser/keybindingsEditorContribution.ts
@@ -177,7 +177,7 @@ export class KeybindingEditorDecorationsRenderer extends Disposable {
 		this._updateDecorations = this._register(new RunOnceScheduler(() => this._updateDecorationsNow(), 500));
 
 		let model = this._editor.getModel();
-		this._register(model.onDidChangeContent((e) => this._updateDecorations.schedule()));
+		this._register(model.onDidChangeContent(() => this._updateDecorations.schedule()));
 		this._register(this._keybindingService.onDidUpdateKeybindings((e) => this._updateDecorations.schedule()));
 		this._register({
 			dispose: () => {
diff --git a/src/vs/workbench/parts/search/common/searchModel.ts b/src/vs/workbench/parts/search/common/searchModel.ts
index 48ed4a14de6..1b293488fe8 100644
--- a/src/vs/workbench/parts/search/common/searchModel.ts
+++ b/src/vs/workbench/parts/search/common/searchModel.ts
@@ -169,7 +169,7 @@ export class FileMatch extends Disposable {
 
 	private bindModel(model: IModel): void {
 		this._model = model;
-		this._modelListener = this._model.onDidChangeContent(_ => {
+		this._modelListener = this._model.onDidChangeContent(() => {
 			this._updateScheduler.schedule();
 		});
 		this._model.onWillDispose(() => this.onModelWillDispose());
diff --git a/src/vs/workbench/services/textfile/common/textFileEditorModel.ts b/src/vs/workbench/services/textfile/common/textFileEditorModel.ts
index 484e41af3e5..21feb1b1ad7 100644
--- a/src/vs/workbench/services/textfile/common/textFileEditorModel.ts
+++ b/src/vs/workbench/services/textfile/common/textFileEditorModel.ts
@@ -444,7 +444,7 @@ export class TextFileEditorModel extends BaseTextEditorModel implements ITextFil
 					this.setDirty(false);
 				}
 
-				this.toDispose.push(this.textEditorModel.onDidChangeContent((e) => {
+				this.toDispose.push(this.textEditorModel.onDidChangeContent(() => {
 					this.onModelContentChanged();
 				}));