diff --git a/lib/isc/include/isc/stdatomic.h b/lib/isc/include/isc/stdatomic.h
index 7c2e21caa52..90348a6673d 100644
--- a/lib/isc/include/isc/stdatomic.h
+++ b/lib/isc/include/isc/stdatomic.h
@@ -81,6 +81,8 @@ typedef ptrdiff_t	   atomic_ptrdiff_t;
 typedef intmax_t	   atomic_intmax_t;
 typedef uintmax_t	   atomic_uintmax_t;
 
+#define _Atomic(x) x
+
 #define atomic_init(obj, desired)	 (*obj = desired)
 #define atomic_load_explicit(obj, order) __atomic_load_n(obj, order)
 #define atomic_store_explicit(obj, desired, order) \