diff --git a/src/vs/workbench/parts/git/browser/gitActions.contribution.ts b/src/vs/workbench/parts/git/browser/gitActions.contribution.ts
index 707da929df52527205c3a3a70b2590fb104acbbf..71fefe50a2f2fd1f186ac9b4c01d994b1fcc67ba 100644
--- a/src/vs/workbench/parts/git/browser/gitActions.contribution.ts
+++ b/src/vs/workbench/parts/git/browser/gitActions.contribution.ts
@@ -360,13 +360,13 @@ export class WorkbenchUnstageAction extends BaseUnstageAction {
 	}
 }
 
-export class StageRangesAction extends baseeditor.EditorInputAction {
+export abstract class BaseStageRangesAction extends baseeditor.EditorInputAction {
 	private gitService: IGitService;
 	private editorService: IWorkbenchEditorService;
 	private editor:editorbrowser.IDiffEditor;
 
-	constructor(editor:tdeditor.TextDiffEditor, @IGitService gitService: IGitService, @IWorkbenchEditorService editorService : IWorkbenchEditorService) {
-		super('workbench.action.git.stageRanges', nls.localize('stageSelectedLines', "Stage Selected Lines"));
+	constructor(id: string, label: string, editor:tdeditor.TextDiffEditor, @IGitService gitService: IGitService, @IWorkbenchEditorService editorService : IWorkbenchEditorService) {
+		super(id, label);
 
 		this.editorService = editorService;
 		this.gitService = gitService;
@@ -395,8 +395,12 @@ export class StageRangesAction extends baseeditor.EditorInputAction {
 		return stageranges.getSelectedChanges(changes, selections).length > 0;
 	}
 
+	protected getRangesAppliedResult(editor: editorbrowser.IDiffEditor) {
+		return stageranges.stageRanges(editor);
+	}
+
 	public run():TPromise<any> {
-		var result = stageranges.stageRanges(this.editor);
+		var result = this.getRangesAppliedResult(this.editor);
 
 		var status = (<gitei.GitWorkingTreeDiffEditorInput>this.input).getFileStatus();
 		var path = status.getPath();
@@ -426,6 +430,28 @@ export class StageRangesAction extends baseeditor.EditorInputAction {
 	}
 }
 
+export class StageRangesAction extends BaseStageRangesAction {
+	static ID = 'workbench.action.git.stageRanges';
+	static LABEL = nls.localize('stageSelectedLines', "Stage Selected Lines");
+
+	constructor(editor:tdeditor.TextDiffEditor, @IGitService gitService: IGitService, @IWorkbenchEditorService editorService : IWorkbenchEditorService) {
+		super(StageRangesAction.ID, StageRangesAction.LABEL, editor, gitService, editorService);
+	}
+}
+
+export class UnstageRangesAction extends BaseStageRangesAction {
+	static ID = 'workbench.action.git.unstageRanges';
+	static LABEL = nls.localize('unstageSelectedLines', "Unstage Selected Lines");
+
+	constructor(editor:tdeditor.TextDiffEditor, @IGitService gitService: IGitService, @IWorkbenchEditorService editorService : IWorkbenchEditorService) {
+		super(UnstageRangesAction.ID, UnstageRangesAction.LABEL, editor, gitService, editorService);
+	}
+
+	protected getRangesAppliedResult(editor: editorbrowser.IDiffEditor) {
+		return stageranges.unstageRanges(editor);
+	}
+}
+
 class FileEditorActionContributor extends baseeditor.EditorInputActionContributor {
 	private instantiationService:IInstantiationService;
 
@@ -472,10 +498,14 @@ class GitWorkingTreeDiffEditorActionContributor extends baseeditor.EditorInputAc
 	}
 
 	public hasSecondaryActionsForEditorInput(context:baseeditor.IEditorInputActionContext):boolean {
-		return (context.input instanceof gitei.GitWorkingTreeDiffEditorInput && context.editor instanceof tdeditor.TextDiffEditor);
+		return (context.input instanceof gitei.GitDiffEditorInput && context.editor instanceof tdeditor.TextDiffEditor);
 	}
 
 	public getSecondaryActionsForEditorInput(context:baseeditor.IEditorInputActionContext):baseeditor.IEditorInputAction[] {
+		if (context.input instanceof gitei.GitIndexDiffEditorInput) {
+			return [ this.instantiationService.createInstance(UnstageRangesAction, <tdeditor.TextDiffEditor>context.editor) ];
+		}
+
 		return [ this.instantiationService.createInstance(StageRangesAction, <tdeditor.TextDiffEditor>context.editor) ];
 	}
 }
diff --git a/src/vs/workbench/parts/git/common/stageRanges.ts b/src/vs/workbench/parts/git/common/stageRanges.ts
index 4281cf7f079d57922e370050496b3ef80b31d2f9..32382e5628390678525e0f829ae750de6a787cd3 100644
--- a/src/vs/workbench/parts/git/common/stageRanges.ts
+++ b/src/vs/workbench/parts/git/common/stageRanges.ts
@@ -48,6 +48,17 @@ export function stageRanges(diff:editorbrowser.IDiffEditor): string {
 	return applyChangesToModel(diff.getModel().original, diff.getModel().modified, changes);
 }
 
+export function unstageRanges(diff:editorbrowser.IDiffEditor): string {
+	var selections = diff.getSelections();
+	var changes = getSelectedChanges(diff.getLineChanges(), selections);
+
+	changes.forEach((change) => {
+		[change.originalStartLineNumber, change.originalEndLineNumber, change.modifiedStartLineNumber, change.modifiedEndLineNumber] = [change.modifiedStartLineNumber, change.modifiedEndLineNumber, change.originalStartLineNumber, change.originalEndLineNumber];
+	});
+
+	return applyChangesToModel(diff.getModel().modified, diff.getModel().original, changes);
+}
+
 /**
  * Returns an intersection between a change and a selection.
  * Returns null if intersection does not exist.