diff --git a/Foundation/include/Poco/AtomicCounter.h b/Foundation/include/Poco/AtomicCounter.h
index 52e8a07c2..4c7c7884f 100644
--- a/Foundation/include/Poco/AtomicCounter.h
+++ b/Foundation/include/Poco/AtomicCounter.h
@@ -23,10 +23,12 @@
 	#include "Poco/UnWindows.h"
 #elif POCO_OS == POCO_OS_MAC_OS_X
 	#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 101200 || __IPHONE_OS_VERSION_MAX_ALLOWED >= 100000 || __TV_OS_VERSION_MAX_ALLOWED >= 100000 || __WATCH_OS_VERSION_MAX_ALLOWED >= 30000
-		#ifndef POCO_HAVE_STD_ATOMICS
-			#if __cplusplus >= 201103L
+		#if __cplusplus >= 201103L
+			#ifndef POCO_HAVE_STD_ATOMICS
 				#define POCO_HAVE_STD_ATOMICS
 			#endif
+		#else
+			#include <libkern/OSAtomic.h>
 		#endif
 	#else
 		#include <libkern/OSAtomic.h>