diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 19c47db2193..254b8d7e61b 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -7084,7 +7084,7 @@ const _super = (function (geti, seti) {
                             hoistedVars = [];
                         }
 
-                        hoistedVars.push((<ImportEqualsDeclaration>node).name);
+                        hoistedVars.push(node.name);
                         return;
                     }
 
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 65405db79ae..60b041d843c 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1178,7 +1178,7 @@ namespace ts {
         return (<ExternalModuleReference>(<ImportEqualsDeclaration>node).moduleReference).expression;
     }
 
-    export function isInternalModuleImportEqualsDeclaration(node: Node): boolean {
+    export function isInternalModuleImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration {
         return node.kind === SyntaxKind.ImportEqualsDeclaration && (<ImportEqualsDeclaration>node).moduleReference.kind !== SyntaxKind.ExternalModuleReference;
     }