diff --git a/src/shims/atomic.h b/src/shims/atomic.h
index 0bb27d3de..c002e726a 100644
--- a/src/shims/atomic.h
+++ b/src/shims/atomic.h
@@ -32,7 +32,7 @@
 #endif
 
 // FreeBSD only defines _Bool in C mode. In C++ mode _Bool is not being defined.
-#if defined(__cplusplus) && (defined(__FreeBSD__) || defined(_WIN32))
+#if defined(__cplusplus)
 #define _Bool bool
 #endif
 #include <stdatomic.h>