diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 34ee591a64f42..d97e232ec31c2 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -144,9 +144,9 @@ namespace ts {
         const voidType = createIntrinsicType(TypeFlags.Void, "void");
         const neverType = createIntrinsicType(TypeFlags.Never, "never");
         const silentNeverType = createIntrinsicType(TypeFlags.Never, "never");
+        const nonPrimitiveType = createIntrinsicType(TypeFlags.NonPrimitive, "object");
 
         const emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        const nonPrimitiveType = createNonPrimitiveType();
 
         const emptyTypeLiteralSymbol = createSymbol(SymbolFlags.TypeLiteral | SymbolFlags.Transient, "__type");
         emptyTypeLiteralSymbol.members = createMap<Symbol>();
@@ -1662,13 +1662,6 @@ namespace ts {
             return type;
         }
 
-        function createNonPrimitiveType(): ResolvedType {
-            const type = setStructuredTypeMembers(
-                createObjectType(ObjectFlags.NonPrimitive, undefined),
-                emptySymbols, emptyArray, emptyArray, undefined, undefined);
-            return type;
-        }
-
         function createObjectType(objectFlags: ObjectFlags, symbol?: Symbol): ObjectType {
             const type = <ObjectType>createType(TypeFlags.Object);
             type.objectFlags = objectFlags;
@@ -2297,9 +2290,6 @@ namespace ts {
                     else if (type.flags & TypeFlags.UnionOrIntersection) {
                         writeUnionOrIntersectionType(<UnionOrIntersectionType>type, nextFlags);
                     }
-                    else if (getObjectFlags(type) & ObjectFlags.NonPrimitive) {
-                        writer.writeKeyword("object");
-                    }
                     else if (getObjectFlags(type) & (ObjectFlags.Anonymous | ObjectFlags.Mapped)) {
                         writeAnonymousType(<ObjectType>type, nextFlags);
                     }
@@ -4748,6 +4738,7 @@ namespace ts {
                 t.flags & TypeFlags.NumberLike ? globalNumberType :
                 t.flags & TypeFlags.BooleanLike ? globalBooleanType :
                 t.flags & TypeFlags.ESSymbol ? getGlobalESSymbolType() :
+                t.flags & TypeFlags.NonPrimitive ? globalObjectType :
                 t;
         }
 
@@ -7122,6 +7113,8 @@ namespace ts {
             if (source.flags & TypeFlags.Enum && target.flags & TypeFlags.Enum && isEnumTypeRelatedTo(<EnumType>source, <EnumType>target, errorReporter)) return true;
             if (source.flags & TypeFlags.Undefined && (!strictNullChecks || target.flags & (TypeFlags.Undefined | TypeFlags.Void))) return true;
             if (source.flags & TypeFlags.Null && (!strictNullChecks || target.flags & TypeFlags.Null)) return true;
+            if (source.flags & TypeFlags.Object && target === nonPrimitiveType) return true;
+            if (source.flags & TypeFlags.Primitive && target === nonPrimitiveType) return false;
             if (relation === assignableRelation || relation === comparableRelation) {
                 if (source.flags & TypeFlags.Any) return true;
                 if ((source.flags & TypeFlags.Number | source.flags & TypeFlags.NumberLiteral) && target.flags & TypeFlags.EnumLike) return true;
@@ -7440,7 +7433,7 @@ namespace ts {
                         }
                     }
                 }
-                else if (!(source.flags & TypeFlags.Primitive && target === nonPrimitiveType)) {
+                else {
                     if (getObjectFlags(source) & ObjectFlags.Reference && getObjectFlags(target) & ObjectFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
                         // We have type references to same target type, see if relationship holds for all type arguments
                         if (result = typeArgumentsRelatedTo(<TypeReference>source, <TypeReference>target, reportErrors)) {
@@ -9190,6 +9183,9 @@ namespace ts {
         }
 
         function getTypeFacts(type: Type): TypeFacts {
+            if (type === nonPrimitiveType) {
+                return strictNullChecks ? TypeFacts.ObjectStrictFacts : TypeFacts.ObjectFacts;
+            }
             const flags = type.flags;
             if (flags & TypeFlags.String) {
                 return strictNullChecks ? TypeFacts.StringStrictFacts : TypeFacts.StringFacts;
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index db919b56449ec..5b411ffea300f 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2781,6 +2781,7 @@ namespace ts {
         ContainsObjectLiteral   = 1 << 22,  // Type is or contains object literal type
         /* @internal */
         ContainsAnyFunctionType = 1 << 23,  // Type is or contains object literal type
+        NonPrimitive            = 1 << 24,  // intrinsic object type
 
         /* @internal */
         Nullable = Undefined | Null,
@@ -2790,7 +2791,7 @@ namespace ts {
         DefinitelyFalsy = StringLiteral | NumberLiteral | BooleanLiteral | Void | Undefined | Null,
         PossiblyFalsy = DefinitelyFalsy | String | Number | Boolean,
         /* @internal */
-        Intrinsic = Any | String | Number | Boolean | BooleanLiteral | ESSymbol | Void | Undefined | Null | Never,
+        Intrinsic = Any | String | Number | Boolean | BooleanLiteral | ESSymbol | Void | Undefined | Null | Never | NonPrimitive,
         /* @internal */
         Primitive = String | Number | Boolean | Enum | ESSymbol | Void | Undefined | Null | Literal,
         StringLike = String | StringLiteral | Index,
@@ -2798,14 +2799,14 @@ namespace ts {
         BooleanLike = Boolean | BooleanLiteral,
         EnumLike = Enum | EnumLiteral,
         UnionOrIntersection = Union | Intersection,
-        StructuredType = Object | Union | Intersection,
+        StructuredType = Object | Union | Intersection | NonPrimitive,
         StructuredOrTypeParameter = StructuredType | TypeParameter | Index,
         TypeVariable = TypeParameter | IndexedAccess,
 
         // 'Narrowable' types are types where narrowing actually narrows.
         // This *should* be every type other than null, undefined, void, and never
         Narrowable = Any | StructuredType | TypeParameter | Index | IndexedAccess | StringLike | NumberLike | BooleanLike | ESSymbol,
-        NotUnionOrUnit = Any | ESSymbol | Object,
+        NotUnionOrUnit = Any | ESSymbol | Object | NonPrimitive,
         /* @internal */
         RequiresWidening = ContainsWideningType | ContainsObjectLiteral,
         /* @internal */
diff --git a/tests/baselines/reference/nonPrimitiveAssignError.errors.txt b/tests/baselines/reference/nonPrimitiveAssignError.errors.txt
index bb62d494d749a..a9bfaaa4a8a4c 100644
--- a/tests/baselines/reference/nonPrimitiveAssignError.errors.txt
+++ b/tests/baselines/reference/nonPrimitiveAssignError.errors.txt
@@ -1,5 +1,5 @@
 tests/cases/conformance/types/nonPrimitive/nonPrimitiveAssignError.ts(5,1): error TS2322: Type 'object' is not assignable to type '{ foo: string; }'.
-  Property 'foo' is missing in type 'object'.
+  Property 'foo' is missing in type 'Object'.
 tests/cases/conformance/types/nonPrimitive/nonPrimitiveAssignError.ts(13,1): error TS2322: Type 'number' is not assignable to type 'object'.
 tests/cases/conformance/types/nonPrimitive/nonPrimitiveAssignError.ts(14,1): error TS2322: Type 'true' is not assignable to type 'object'.
 tests/cases/conformance/types/nonPrimitive/nonPrimitiveAssignError.ts(15,1): error TS2322: Type 'string' is not assignable to type 'object'.
@@ -16,7 +16,7 @@ tests/cases/conformance/types/nonPrimitive/nonPrimitiveAssignError.ts(19,1): err
     y = a; // expect error
     ~
 !!! error TS2322: Type 'object' is not assignable to type '{ foo: string; }'.
-!!! error TS2322:   Property 'foo' is missing in type 'object'.
+!!! error TS2322:   Property 'foo' is missing in type 'Object'.
     a = x;
     a = y;