diff --git a/include/sys/zfs_context.h b/include/sys/zfs_context.h
index 115bf9759..c44990351 100644
--- a/include/sys/zfs_context.h
+++ b/include/sys/zfs_context.h
@@ -26,7 +26,7 @@
 #ifndef _SYS_ZFS_CONTEXT_H
 #define	_SYS_ZFS_CONTEXT_H
 
-#ifdef _KERNEL
+#ifdef __KERNEL__
 
 #include <sys/note.h>
 #include <sys/types.h>