diff --git a/RxCocoa/Common/CLLocationManager+Rx.swift b/RxCocoa/Common/CLLocationManager+Rx.swift
index 2d46edf6c..d28bfb981 100644
--- a/RxCocoa/Common/CLLocationManager+Rx.swift
+++ b/RxCocoa/Common/CLLocationManager+Rx.swift
@@ -82,6 +82,7 @@ extension CLLocationManager {
             }
     }
     
+    @available(OSX 10.10, *)
     public var rx_didDetermineStateForRegion: Observable<(state: CLRegionState, region: CLRegion!)> {
         return rx_delegate.observe("locationManager:didDetermineState:forRegion:")
             .map { a in