diff --git a/src/vs/editor/common/model.ts b/src/vs/editor/common/model.ts
index 03c99eb566aeb54305055268766742179c66f71d..ff909869d8ea61be546ca67c7ad21f40739e8f01 100644
--- a/src/vs/editor/common/model.ts
+++ b/src/vs/editor/common/model.ts
@@ -1152,6 +1152,5 @@ export class ApplyEditsResult {
  */
 export interface IInternalModelContentChange extends IModelContentChange {
 	range: Range;
-	rangeOffset: number;
 	forceMoveMarkers: boolean;
 }
diff --git a/src/vs/editor/common/model/textModel.ts b/src/vs/editor/common/model/textModel.ts
index 2127ebf1a00aaaa2643069cecf2a27e2fd7ad04e..3975b563698985d56a087f8329b9dc887697495a 100644
--- a/src/vs/editor/common/model/textModel.ts
+++ b/src/vs/editor/common/model/textModel.ts
@@ -386,10 +386,11 @@ export class TextModel extends Disposable implements model.ITextModel {
 		this.setValueFromTextBuffer(textBuffer);
 	}
 
-	private _createContentChanged2(startLineNumber: number, startColumn: number, endLineNumber: number, endColumn: number, rangeLength: number, text: string, isUndoing: boolean, isRedoing: boolean, isFlush: boolean): IModelContentChangedEvent {
+	private _createContentChanged2(range: Range, rangeOffset: number, rangeLength: number, text: string, isUndoing: boolean, isRedoing: boolean, isFlush: boolean): IModelContentChangedEvent {
 		return {
 			changes: [{
-				range: new Range(startLineNumber, startColumn, endLineNumber, endColumn),
+				range: range,
+				rangeOffset: rangeOffset,
 				rangeLength: rangeLength,
 				text: text,
 			}],
@@ -435,7 +436,7 @@ export class TextModel extends Disposable implements model.ITextModel {
 				false,
 				false
 			),
-			this._createContentChanged2(1, 1, endLineNumber, endColumn, oldModelValueLength, this.getValue(), false, false, true)
+			this._createContentChanged2(new Range(1, 1, endLineNumber, endColumn), 0, oldModelValueLength, this.getValue(), false, false, true)
 		);
 	}
 
@@ -466,7 +467,7 @@ export class TextModel extends Disposable implements model.ITextModel {
 				false,
 				false
 			),
-			this._createContentChanged2(1, 1, endLineNumber, endColumn, oldModelValueLength, this.getValue(), false, false, false)
+			this._createContentChanged2(new Range(1, 1, endLineNumber, endColumn), 0, oldModelValueLength, this.getValue(), false, false, false)
 		);
 	}
 
diff --git a/src/vs/editor/common/model/textModelEvents.ts b/src/vs/editor/common/model/textModelEvents.ts
index f65fdca1ef2ea03b9090d2be4c301df1254bdf2f..d6593abd1cbeaf7396dff0fa6f1a5f63a3fe2c13 100644
--- a/src/vs/editor/common/model/textModelEvents.ts
+++ b/src/vs/editor/common/model/textModelEvents.ts
@@ -32,6 +32,10 @@ export interface IModelContentChange {
 	 * The range that got replaced.
 	 */
 	readonly range: IRange;
+	/**
+	 * The offset of the range that got replaced.
+	 */
+	readonly rangeOffset: number;
 	/**
 	 * The length of the range that got replaced.
 	 */
diff --git a/src/vs/monaco.d.ts b/src/vs/monaco.d.ts
index 715a3ec520dfd2ebea471b15a73e28664d06c274..6c481514777544822935a140424238bf1d2e7718 100644
--- a/src/vs/monaco.d.ts
+++ b/src/vs/monaco.d.ts
@@ -2196,6 +2196,10 @@ declare namespace monaco.editor {
 		 * The range that got replaced.
 		 */
 		readonly range: IRange;
+		/**
+		 * The offset of the range that got replaced.
+		 */
+		readonly rangeOffset: number;
 		/**
 		 * The length of the range that got replaced.
 		 */
diff --git a/src/vs/vscode.d.ts b/src/vs/vscode.d.ts
index c841a93202a9204f7a19cf908489941bec7bd2d7..8142906c5ec527ec02ea99070176a6db42138b46 100644
--- a/src/vs/vscode.d.ts
+++ b/src/vs/vscode.d.ts
@@ -5511,6 +5511,10 @@ declare module 'vscode' {
 		 * The range that got replaced.
 		 */
 		range: Range;
+		/**
+		 * The offset of the range that got replaced.
+		 */
+		rangeOffset: number;
 		/**
 		 * The length of the range that got replaced.
 		 */
diff --git a/src/vs/workbench/api/node/extHostDocuments.ts b/src/vs/workbench/api/node/extHostDocuments.ts
index 05cae8cfcb6bd04200ae8a820b6832cb01eaf612..54e17e42f71c80d42f906c7c7bc0755b4e64c814 100644
--- a/src/vs/workbench/api/node/extHostDocuments.ts
+++ b/src/vs/workbench/api/node/extHostDocuments.ts
@@ -137,6 +137,7 @@ export class ExtHostDocuments implements ExtHostDocumentsShape {
 			contentChanges: events.changes.map((change) => {
 				return {
 					range: TypeConverters.toRange(change.range),
+					rangeOffset: change.rangeOffset,
 					rangeLength: change.rangeLength,
 					text: change.text
 				};
diff --git a/src/vs/workbench/test/electron-browser/api/extHostDocumentData.test.ts b/src/vs/workbench/test/electron-browser/api/extHostDocumentData.test.ts
index f808f44c17f06c726cf7532003708fded21aaf39..daad9c035e9ef751f593b05f85f0ce81a4f9201a 100644
--- a/src/vs/workbench/test/electron-browser/api/extHostDocumentData.test.ts
+++ b/src/vs/workbench/test/electron-browser/api/extHostDocumentData.test.ts
@@ -101,6 +101,7 @@ suite('ExtHostDocumentData', () => {
 		data.onEvents({
 			changes: [{
 				range: { startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 1 },
+				rangeOffset: undefined,
 				rangeLength: undefined,
 				text: '\t '
 			}],
@@ -157,6 +158,7 @@ suite('ExtHostDocumentData', () => {
 		data.onEvents({
 			changes: [{
 				range: { startLineNumber: 1, startColumn: 3, endLineNumber: 1, endColumn: 6 },
+				rangeOffset: undefined,
 				rangeLength: undefined,
 				text: ''
 			}],
@@ -174,6 +176,7 @@ suite('ExtHostDocumentData', () => {
 		data.onEvents({
 			changes: [{
 				range: { startLineNumber: 1, startColumn: 3, endLineNumber: 1, endColumn: 6 },
+				rangeOffset: undefined,
 				rangeLength: undefined,
 				text: 'is could be'
 			}],
@@ -191,6 +194,7 @@ suite('ExtHostDocumentData', () => {
 		data.onEvents({
 			changes: [{
 				range: { startLineNumber: 1, startColumn: 3, endLineNumber: 1, endColumn: 6 },
+				rangeOffset: undefined,
 				rangeLength: undefined,
 				text: 'is could be\na line with number'
 			}],
@@ -211,6 +215,7 @@ suite('ExtHostDocumentData', () => {
 		data.onEvents({
 			changes: [{
 				range: { startLineNumber: 1, startColumn: 3, endLineNumber: 2, endColumn: 6 },
+				rangeOffset: undefined,
 				rangeLength: undefined,
 				text: ''
 			}],
@@ -344,6 +349,7 @@ suite('ExtHostDocumentData updates line mapping', () => {
 		return {
 			changes: [{
 				range: range,
+				rangeOffset: undefined,
 				rangeLength: undefined,
 				text: text
 			}],
diff --git a/src/vs/workbench/test/electron-browser/api/extHostDocumentSaveParticipant.test.ts b/src/vs/workbench/test/electron-browser/api/extHostDocumentSaveParticipant.test.ts
index b44d25fba635b77a2187142c6edac90982aa53f4..a8c6bfbfcdf7eb090c62cafb96317cb2b9a615d9 100644
--- a/src/vs/workbench/test/electron-browser/api/extHostDocumentSaveParticipant.test.ts
+++ b/src/vs/workbench/test/electron-browser/api/extHostDocumentSaveParticipant.test.ts
@@ -302,6 +302,7 @@ suite('ExtHostDocumentSaveParticipant', () => {
 			documents.$acceptModelChanged(resource, {
 				changes: [{
 					range: { startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 1 },
+					rangeOffset: undefined,
 					rangeLength: undefined,
 					text: 'bar'
 				}],
@@ -337,6 +338,7 @@ suite('ExtHostDocumentSaveParticipant', () => {
 							changes: [{
 								range,
 								text,
+								rangeOffset: undefined,
 								rangeLength: undefined,
 							}],
 							eol: undefined,