diff --git a/lib/isc/win32/include/isc/stdatomic.h b/lib/isc/win32/include/isc/stdatomic.h
index 1cf71dc3a4..64e5d3e1ae 100644
--- a/lib/isc/win32/include/isc/stdatomic.h
+++ b/lib/isc/win32/include/isc/stdatomic.h
@@ -19,6 +19,7 @@
 
 #include <intrin.h>
 
+#define InterlockedExchangeAdd8 _InterlockedExchangeAdd8
 #define InterlockedCompareExchange8 _InterlockedCompareExchange8
 
 #include <isc/util.h>