diff --git a/src/services/services.ts b/src/services/services.ts
index eeaef60afca..967e9949d49 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -4061,7 +4061,6 @@ namespace ts {
                     return undefined;
                 }
 
-                isNameOfExternalModuleImportOrDeclaration
                 const argumentInfo = SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
                 if (argumentInfo) {
                     return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);