diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 1965cb20c8d49..5e9a6636d0e3b 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -2707,7 +2707,7 @@ namespace ts.server {
                 sourceMapFileInfo = mapInfo;
                 const snap = mapInfo.getSnapshot();
                 if (mapInfo.documentPositionMapper !== undefined) return mapInfo.documentPositionMapper;
-                return snap.getText(0, snap.getLength());
+                return getSnapshotText(snap);
             };
             const projectName = project.projectName;
             const documentPositionMapper = getDocumentPositionMapper(