diff --git a/zebra/kernel_socket.c b/zebra/kernel_socket.c
index 1518c1a..7553491 100644
--- a/zebra/kernel_socket.c
+++ b/zebra/kernel_socket.c
@@ -78,9 +78,9 @@
 
 /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */
 #ifdef __APPLE__
-#define ROUNDUP_TYPE	long
-#else
 #define ROUNDUP_TYPE	int
+#else
+#define ROUNDUP_TYPE	long
 #endif
 
 #define ROUNDUP(a) \