diff --git a/retrace/glws_cocoa.mm b/retrace/glws_cocoa.mm
index e410862f1..351f0f32d 100644
--- a/retrace/glws_cocoa.mm
+++ b/retrace/glws_cocoa.mm
@@ -47,6 +47,7 @@
 
 #include <Cocoa/Cocoa.h>
 
+#include "os_thread.hpp"
 #include "glws.hpp"
 
 
@@ -74,8 +75,8 @@ + (void)enterMultiThreaded {
 namespace glws {
 
 
-static __thread NSAutoreleasePool *
-autoreleasePool = nil;
+static OS_THREAD_SPECIFIC_PTR(NSAutoreleasePool)
+autoreleasePool;
 
 
 class CocoaVisual : public Visual