diff --git a/src/include/86box/plat.h b/src/include/86box/plat.h
index ecf8cb063..75c32d087 100644
--- a/src/include/86box/plat.h
+++ b/src/include/86box/plat.h
@@ -64,16 +64,17 @@ extern int strnicmp(const char* s1, const char* s2, size_t n);
 
 #ifdef __cplusplus
 #include <atomic>
-#define atomic_flag std::atomic_flag
+#define atomic_flag_t std::atomic_flag
 extern "C" {
 #else
 #include <stdatomic.h>
+#define atomic_flag_t atomic_flag
 #endif
 
 /* Global variables residing in the platform module. */
 extern int	dopause,			/* system is paused */
 		mouse_capture;			/* mouse is captured in app */
-extern atomic_flag doresize;			/* screen resize requested */
+extern atomic_flag_t doresize;			/* screen resize requested */
 extern volatile int	is_quit;				/* system exit requested */
 
 #ifdef MTR_ENABLED