diff --git a/include/aws/common/platform.h b/include/aws/common/platform.h
index c992541ee..d08b61d1e 100644
--- a/include/aws/common/platform.h
+++ b/include/aws/common/platform.h
@@ -30,6 +30,7 @@
 #        define AWS_USE_SECITEM
 #    else
 #        define AWS_OS_MACOS
+#        define AWS_USE_KQUEUE
 #    endif
 #elif __linux__
 #    define AWS_OS_LINUX