diff --git a/extensions/markdown/src/extension.ts b/extensions/markdown/src/extension.ts
index 64425e83830..d26c276e7e6 100644
--- a/extensions/markdown/src/extension.ts
+++ b/extensions/markdown/src/extension.ts
@@ -346,7 +346,7 @@ function showSource(mdUri: vscode.Uri) {
 
 	const docUri = vscode.Uri.parse(mdUri.query);
 	for (const editor of vscode.window.visibleTextEditors) {
-		if (editor.document.uri.toString() === docUri.toString()) {
+		if (editor.document.uri.fsPath === docUri.fsPath) {
 			return vscode.window.showTextDocument(editor.document, editor.viewColumn);
 		}
 	}
diff --git a/extensions/markdown/src/previewContentProvider.ts b/extensions/markdown/src/previewContentProvider.ts
index 0b60857b1b1..2479c966378 100644
--- a/extensions/markdown/src/previewContentProvider.ts
+++ b/extensions/markdown/src/previewContentProvider.ts
@@ -28,7 +28,7 @@ export function isMarkdownFile(document: vscode.TextDocument) {
 }
 
 export function getMarkdownUri(uri: vscode.Uri) {
-	return uri.with({ scheme: 'markdown', path: uri.path + '.rendered', query: uri.toString() });
+	return uri.with({ scheme: 'markdown', path: uri.fsPath + '.rendered', query: uri.toString() });
 }
 
 export class MDDocumentContentProvider implements vscode.TextDocumentContentProvider {
@@ -143,8 +143,8 @@ export class MDDocumentContentProvider implements vscode.TextDocumentContentProv
 			}
 
 			const initialData = {
-				previewUri: encodeURIComponent(uri.toString(true)),
-				source: encodeURIComponent(sourceUri.toString(true)),
+				previewUri: encodeURIComponent(uri.fsPath),
+				source: encodeURIComponent(sourceUri.fsPath),
 				line: initialLine,
 				scrollPreviewWithEditorSelection: !!markdownConfig.get('preview.scrollPreviewWithEditorSelection', true),
 				scrollEditorWithPreview: !!markdownConfig.get('preview.scrollEditorWithPreview', true),