diff --git a/src/services/services.ts b/src/services/services.ts
index 1618fb6e276..09a002d774b 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1956,8 +1956,7 @@ module ts {
         function createCompilerHost(): CompilerHost {
             return {
                 getSourceFile: (filename, languageVersion) => {
-                    var sourceFile = getSourceFile(filename);
-                    return sourceFile && sourceFile.getSourceFile();
+                    return getSourceFile(filename);
                 },
                 getCancellationToken: () => cancellationToken,
                 getCanonicalFileName: (filename) => useCaseSensitivefilenames ? filename : filename.toLowerCase(),