diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 63eb3af784c..46466478029 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -137,10 +137,6 @@ module ts {
         }
     }
 
-    export function getDefaultLibFileName(options: CompilerOptions): string {
-        return options.target === ScriptTarget.ES6 ? "lib.es6.d.ts" : "lib.d.ts";
-    }
-
     export function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost): Program {
         let program: Program;
         let files: SourceFile[] = [];
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 533a8b25e4f..8a34d2f315b 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1641,6 +1641,10 @@ module ts {
 }
 
 module ts {
+    export function getDefaultLibFileName(options: CompilerOptions): string {
+        return options.target === ScriptTarget.ES6 ? "lib.es6.d.ts" : "lib.d.ts";
+    }
+
     export function textSpanEnd(span: TextSpan) {
         return span.start + span.length
     }