diff --git a/packages/core/src/render3/instructions/styling.ts b/packages/core/src/render3/instructions/styling.ts
index 0fe940e6ca..c8d9e0ed67 100644
--- a/packages/core/src/render3/instructions/styling.ts
+++ b/packages/core/src/render3/instructions/styling.ts
@@ -119,9 +119,7 @@ export function ɵɵclassProp(
  *
  * @codeGenApi
  */
-export function ɵɵstyleMap(
-    styles: {[styleName: string]: any} | Map<string, string|number|null|undefined>| string |
-    undefined | null): void {
+export function ɵɵstyleMap(styles: {[styleName: string]: any} | string | undefined | null): void {
   checkStylingMap(styleKeyValueArraySet, styleStringParser, styles, false);
 }
 
@@ -161,8 +159,7 @@ export function styleStringParser(keyValueArray: KeyValueArray<any>, text: strin
  * @codeGenApi
  */
 export function ɵɵclassMap(
-    classes: {[className: string]: boolean | undefined | null} |
-    Map<string, boolean|undefined|null>| Set<string>| string[] | string | undefined | null): void {
+    classes: {[className: string]: boolean | undefined | null} | string | undefined | null): void {
   checkStylingMap(keyValueArraySet, classStringParser, classes, true);
 }
 
@@ -626,8 +623,8 @@ export function getHostDirectiveDef(tData: TData): DirectiveDef<any>|null {
  */
 export function toStylingKeyValueArray(
     keyValueArraySet: (keyValueArray: KeyValueArray<any>, key: string, value: any) => void,
-    stringParser: (styleKeyValueArray: KeyValueArray<any>, text: string) => void, value: string|
-    string[]|{[key: string]: any}|Map<any, any>|Set<any>|null|undefined): KeyValueArray<any> {
+    stringParser: (styleKeyValueArray: KeyValueArray<any>, text: string) => void,
+    value: string|string[]|{[key: string]: any}|null|undefined): KeyValueArray<any> {
   if (value == null /*|| value === undefined */ || value === '') return EMPTY_ARRAY as any;
   const styleKeyValueArray: KeyValueArray<any> = [] as any;
   if (Array.isArray(value)) {
@@ -635,15 +632,9 @@ export function toStylingKeyValueArray(
       keyValueArraySet(styleKeyValueArray, value[i], true);
     }
   } else if (typeof value === 'object') {
-    if (value instanceof Map) {
-      value.forEach((v, k) => keyValueArraySet(styleKeyValueArray, k, v));
-    } else if (value instanceof Set) {
-      value.forEach((k) => keyValueArraySet(styleKeyValueArray, k, true));
-    } else {
-      for (const key in value) {
-        if (value.hasOwnProperty(key)) {
-          keyValueArraySet(styleKeyValueArray, key, value[key]);
-        }
+    for (const key in value) {
+      if (value.hasOwnProperty(key)) {
+        keyValueArraySet(styleKeyValueArray, key, value[key]);
       }
     }
   } else if (typeof value === 'string') {
@@ -674,11 +665,10 @@ function styleKeyValueArraySet(keyValueArray: KeyValueArray<any>, key: string, v
  * Update map based styling.
  *
  * Map based styling could be anything which contains more than one binding. For example `string`,
- * `Map`, `Set` or object literal. Dealing with all of these types would complicate the logic so
+ * or object literal. Dealing with all of these types would complicate the logic so
  * instead this function expects that the complex input is first converted into normalized
  * `KeyValueArray`. The advantage of normalization is that we get the values sorted, which makes it
- * very
- * cheap to compute deltas between the previous and current value.
+ * very cheap to compute deltas between the previous and current value.
  *
  * @param tView Associated `TView.data` contains the linked list of binding priorities.
  * @param tNode `TNode` where the binding is located.
diff --git a/packages/core/test/render3/instructions/styling_spec.ts b/packages/core/test/render3/instructions/styling_spec.ts
index bc71737c69..22a09c4e68 100644
--- a/packages/core/test/render3/instructions/styling_spec.ts
+++ b/packages/core/test/render3/instructions/styling_spec.ts
@@ -440,19 +440,6 @@ describe('styling', () => {
           ] as any);
         });
       });
-      describe('Map', () => {
-        it('should parse', () => {
-          expect(toStylingKeyValueArray(
-                     keyValueArraySet, null !, new Map<string, string>([['X', 'x'], ['A', 'a']])))
-              .toEqual(['A', 'a', 'X', 'x'] as any);
-        });
-      });
-      describe('Iterable', () => {
-        it('should parse', () => {
-          expect(toStylingKeyValueArray(keyValueArraySet, null !, new Set<string>(['X', 'A'])))
-              .toEqual(['A', true, 'X', true] as any);
-        });
-      });
     });
   });
 
diff --git a/tools/public_api_guard/core/core.d.ts b/tools/public_api_guard/core/core.d.ts
index 1b3220ba04..9e60f3f254 100644
--- a/tools/public_api_guard/core/core.d.ts
+++ b/tools/public_api_guard/core/core.d.ts
@@ -704,7 +704,7 @@ export declare function ɵɵattributeInterpolateV(attrName: string, values: any[
 
 export declare function ɵɵclassMap(classes: {
     [className: string]: boolean | undefined | null;
-} | Map<string, boolean | undefined | null> | Set<string> | string[] | string | undefined | null): void;
+} | string | undefined | null): void;
 
 export declare function ɵɵclassMapInterpolate1(prefix: string, v0: any, suffix: string): void;
 
@@ -1035,7 +1035,7 @@ export declare function ɵɵstaticViewQuery<T>(predicate: Type<any> | string[],
 
 export declare function ɵɵstyleMap(styles: {
     [styleName: string]: any;
-} | Map<string, string | number | null | undefined> | string | undefined | null): void;
+} | string | undefined | null): void;
 
 export declare function ɵɵstyleProp(prop: string, value: string | number | SafeValue | undefined | null, suffix?: string | null): typeof ɵɵstyleProp;