diff --git a/RxCocoa/Common/RxCocoa.swift b/RxCocoa/Common/RxCocoa.swift
index 2f8573ad..9c58d6c1 100644
--- a/RxCocoa/Common/RxCocoa.swift
+++ b/RxCocoa/Common/RxCocoa.swift
@@ -278,15 +278,6 @@ func castOrFatalError<T>(value: AnyObject!, message: String) -> T {
     return result
 }
 
-func castOrFatalError<T>(value: AnyObject!) -> T {
-    let maybeResult: T? = value as? T
-    guard let result = maybeResult else {
-        rxFatalError("Failure converting from \(value) to \(T.self)")
-    }
-    
-    return result
-}
-
 func castOrFatalError<T>(value: Any!) -> T {
     let maybeResult: T? = value as? T
     guard let result = maybeResult else {