diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ae59997b7a2..9bd940e547e 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -13690,7 +13690,7 @@ namespace ts {
                     const doubleEquals = operator === SyntaxKind.EqualsEqualsToken || operator === SyntaxKind.ExclamationEqualsToken;
                     const facts = doubleEquals ?
                         assumeTrue ? TypeFacts.EQUndefinedOrNull : TypeFacts.NEUndefinedOrNull :
-                        value.kind === SyntaxKind.NullKeyword ?
+                        valueType.flags & TypeFlags.Null ?
                             assumeTrue ? TypeFacts.EQNull : TypeFacts.NENull :
                             assumeTrue ? TypeFacts.EQUndefined : TypeFacts.NEUndefined;
                     return getTypeWithFacts(type, facts);