diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index dd9b56a5b58..0c65050a327 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -987,7 +987,7 @@ namespace ts {
                     return node.parent ? getEntityNameForExtendingInterface(node.parent) : undefined;
                 case SyntaxKind.ExpressionWithTypeArguments:
                     Debug.assert(isEntityNameExpression((<ExpressionWithTypeArguments>node).expression));
-                    return <EntityNameExpression>(<ExpressionWithTypeArguments>node).expression
+                    return <EntityNameExpression>(<ExpressionWithTypeArguments>node).expression;
                 default:
                     return undefined;
             }