diff --git a/src/services/services.ts b/src/services/services.ts
index 587b07390a2..5ad63e50811 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -3923,7 +3923,9 @@ module ts {
 
                 // When a name gets interned into a SourceFile's 'identifiers' Map,
                 // its name is escaped and stored in the same way its symbol name/identifier
-                // name should be stored.
+                // name should be stored. Function expressions, however, are a special case,
+                // because despite sometimes having a name, the binder unconditionally binds them
+                // to a symbol with the name "__function".
                 if (functionExpression && functionExpression.name) {
                     var name = functionExpression.name.text;
                 }
@@ -5400,7 +5402,7 @@ module ts {
             getFormattingEditsForDocument,
             getFormattingEditsAfterKeystroke,
             getEmitOutput,
-            getSourceFile: getCurrentSourceFile,
+            getSourceFile: getCurrentSourceFile,
         };
     }