diff --git a/config/kernel.m4 b/config/kernel.m4
index 952eb3f3e3..9906fc5a31 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -27,6 +27,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
 	dnl # compiler options are added by the kernel build system.
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -Werror -DHAVE_SPL -D_KERNEL"
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -I$SPL"
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -I$SPL/include"
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -include $SPL/spl_config.h"
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -include $TOPDIR/zfs_config.h"