diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 6bd75c5d283..b2f6e1634c2 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -74,7 +74,7 @@ module ts {
             isImplementationOfOverload,
             getAliasedSymbol: resolveAlias,
             getEmitResolver,
-            getExportsOfModule: moduleSymbol => symbolsToArray(getExportsOfModule(moduleSymbol)),
+            getExportsOfModule: getExportsOfModuleAsArray,
         };
 
         let unknownSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient, "unknown");
@@ -872,6 +872,10 @@ module ts {
             return moduleSymbol.exports["export="];
         }
 
+        function getExportsOfModuleAsArray(moduleSymbol: Symbol): Symbol[] {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+
         function getExportsOfSymbol(symbol: Symbol): SymbolTable {
             return symbol.flags & SymbolFlags.Module ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
         }