diff --git a/sys/i386/include/endian.h b/sys/i386/include/endian.h
index 1787c0f94636..723fda78b3b1 100644
--- a/sys/i386/include/endian.h
+++ b/sys/i386/include/endian.h
@@ -55,6 +55,10 @@
 
 #ifndef KERNEL
 #include <sys/cdefs.h>
+#else
+#ifndef ACTUALLY_LKM_NOT_KERNEL
+#include "opt_cpu.h"
+#endif
 #endif
 
 #define __word_swap_long(x) \