diff --git a/Source/RxSwift/ObservableType+ObjectMapper.swift b/Source/RxSwift/ObservableType+ObjectMapper.swift
index 61a16375..00d8900f 100644
--- a/Source/RxSwift/ObservableType+ObjectMapper.swift
+++ b/Source/RxSwift/ObservableType+ObjectMapper.swift
@@ -31,26 +31,3 @@ public extension ObservableType where E == Response {
     }
   }
 }
-
-
-// MARK: - ImmutableMappable
-public extension ObservableType where E == Response {
-
-  /// Maps data received from the signal into an object
-  /// which implements the ImmutableMappable protocol and returns the result back
-  /// If the conversion fails, the signal errors.
-  public func mapObject<T: ImmutableMappable>(_ type: T.Type, context: MapContext? = nil) -> Observable<T> {
-    return flatMap { response -> Observable<T> in
-			return Observable.just(try response.mapObject(T.self, context: context))
-    }
-  }
-
-  /// Maps data received from the signal into an array of objects
-  /// which implement the ImmutableMappable protocol and returns the result back
-  /// If the conversion fails, the signal errors.
-  public func mapArray<T: ImmutableMappable>(_ type: T.Type, context: MapContext? = nil) -> Observable<[T]> {
-    return flatMap { response -> Observable<[T]> in
-			return Observable.just(try response.mapArray(T.self, context: context))
-    }
-  }
-}
diff --git a/Source/RxSwift/Single+ObjectMapper.swift b/Source/RxSwift/Single+ObjectMapper.swift
index fae867cd..09a6f4ec 100755
--- a/Source/RxSwift/Single+ObjectMapper.swift
+++ b/Source/RxSwift/Single+ObjectMapper.swift
@@ -31,26 +31,3 @@ public extension PrimitiveSequence where TraitType == SingleTrait, ElementType =
                 }
     }
 }
-
-
-// MARK: - ImmutableMappable
-public extension PrimitiveSequence where TraitType == SingleTrait, ElementType == Response {
-
-    /// Maps data received from the signal into an object
-    /// which implements the ImmutableMappable protocol and returns the result back
-    /// If the conversion fails, the signal errors.
-    public func mapObject<T: ImmutableMappable>(_ type: T.Type, context: MapContext? = nil) -> Single<T> {
-        return flatMap { response -> Single<T> in
-                    return Single.just(try response.mapObject(type, context: context))
-                }
-    }
-
-    /// Maps data received from the signal into an array of objects
-    /// which implement the ImmutableMappable protocol and returns the result back
-    /// If the conversion fails, the signal errors.
-    public func mapArray<T: ImmutableMappable>(_ type: T.Type, context: MapContext? = nil) -> Single<[T]> {
-        return flatMap { response -> Single<[T]> in
-                    return Single.just(try response.mapArray(type, context: context))
-                }
-    }
-}