diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 95c7d33d5aa..6a1d6b52abb 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8327,10 +8327,7 @@ namespace ts {
             if (right.flags & TypeFlags.Union) {
                 return mapType(right, t => getSpreadType(left, t, symbol, propagatedFlags));
             }
-            if (right.flags & TypeFlags.NonPrimitive) {
-                return nonPrimitiveType;
-            }
-            if (right.flags & (TypeFlags.BooleanLike | TypeFlags.NumberLike | TypeFlags.StringLike | TypeFlags.EnumLike)) {
+            if (right.flags & (TypeFlags.BooleanLike | TypeFlags.NumberLike | TypeFlags.StringLike | TypeFlags.EnumLike | TypeFlags.NonPrimitive)) {
                 return left;
             }