diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index bbc4f5990de..10e11e66eb0 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -138,6 +138,7 @@ namespace ts {
             languageVersion = getEmitScriptTarget(options);
             inStrictMode = !!file.externalModuleIndicator;
             classifiableNames = {};
+            symbolCount = 0;
 
             Symbol = objectAllocator.getSymbolConstructor();