diff --git a/src/vs/platform/files/common/files.ts b/src/vs/platform/files/common/files.ts
index 731fe0ab7fd04b7e398536226058b7fca288d124..e6f5209589193f65ef4e5125295e2f6822d1bad0 100644
--- a/src/vs/platform/files/common/files.ts
+++ b/src/vs/platform/files/common/files.ts
@@ -362,7 +362,7 @@ export function isEqualOrParent(path: string, candidate: string, ignoreCase?: bo
 	return path.indexOf(candidate) === 0;
 }
 
-export function indexOf(path: string, candidate: string): number {
+export function indexOf(path: string, candidate: string, ignoreCase?: boolean): number {
 	if (candidate.length > path.length) {
 		return -1;
 	}
@@ -371,7 +371,7 @@ export function indexOf(path: string, candidate: string): number {
 		return 0;
 	}
 
-	if (!isLinux) {
+	if (ignoreCase) {
 		path = path.toLowerCase();
 		candidate = candidate.toLowerCase();
 	}
diff --git a/src/vs/platform/files/test/files.test.ts b/src/vs/platform/files/test/files.test.ts
index 6169607ad44976efafc4b83640371640c16dc289..14f4643f7499160b68f0eb52b45626aaacd3878f 100644
--- a/src/vs/platform/files/test/files.test.ts
+++ b/src/vs/platform/files/test/files.test.ts
@@ -188,19 +188,15 @@ suite('Files', () => {
 		}
 	});
 
-	test('indexOf', function () {
-		assert.equal(indexOf('/some/path', '/some/path'), 0);
-		assert.equal(indexOf('/some/path/more', '/some/path'), 0);
+	test('indexOf (ignorecase)', function () {
+		assert.equal(indexOf('/some/path', '/some/path', true), 0);
+		assert.equal(indexOf('/some/path/more', '/some/path', true), 0);
 
-		assert.equal(indexOf('c:\\some\\path', 'c:\\some\\path'), 0);
-		assert.equal(indexOf('c:\\some\\path\\more', 'c:\\some\\path'), 0);
+		assert.equal(indexOf('c:\\some\\path', 'c:\\some\\path', true), 0);
+		assert.equal(indexOf('c:\\some\\path\\more', 'c:\\some\\path', true), 0);
 
-		assert.equal(indexOf('/some/path', '/some/other/path'), -1);
+		assert.equal(indexOf('/some/path', '/some/other/path', true), -1);
 
-		if (isLinux) {
-			assert.equal(indexOf('/some/path', '/some/PATH'), -1);
-		} else {
-			assert.equal(indexOf('/some/path', '/some/PATH'), 0);
-		}
+		assert.equal(indexOf('/some/path', '/some/PATH', true), 0);
 	});
 });
\ No newline at end of file
diff --git a/src/vs/workbench/parts/files/common/editors/fileEditorTracker.ts b/src/vs/workbench/parts/files/common/editors/fileEditorTracker.ts
index b8d8a123b0fd83e8551eef69a56b81824a2b9456..1ea7c0e74529877bf527ace132b66401d0ae98f7 100644
--- a/src/vs/workbench/parts/files/common/editors/fileEditorTracker.ts
+++ b/src/vs/workbench/parts/files/common/editors/fileEditorTracker.ts
@@ -200,7 +200,7 @@ export class FileEditorTracker implements IWorkbenchContribution {
 						if (oldResource.toString() === resource.toString()) {
 							reopenFileResource = newResource; // file got moved
 						} else {
-							const index = indexOf(resource.fsPath, oldResource.fsPath);
+							const index = indexOf(resource.fsPath, oldResource.fsPath, !isLinux /* ignorecase */);
 							reopenFileResource = URI.file(paths.join(newResource.fsPath, resource.fsPath.substr(index + oldResource.fsPath.length + 1))); // parent folder got moved
 						}