diff --git a/Sources/Foundation/RunLoop.swift b/Sources/Foundation/RunLoop.swift
index 05cfa14946..b002e43ca6 100644
--- a/Sources/Foundation/RunLoop.swift
+++ b/Sources/Foundation/RunLoop.swift
@@ -323,7 +323,7 @@ extension RunLoop {
                 },
                 hash: { (info) -> CFHashCode in
                     let me = Unmanaged<_Source>.fromOpaque(info!).takeUnretainedValue()
-                    return CFHashCode(me.hashValue)
+                    return CFHashCode(bitPattern: me.hashValue)
                 },
                 schedule: { (info, cfRunLoop, cfRunLoopMode) in
                     let me = Unmanaged<_Source>.fromOpaque(info!).takeUnretainedValue()