diff --git a/sys/compat/linuxkpi/common/include/linux/io.h b/sys/compat/linuxkpi/common/include/linux/io.h
--- a/sys/compat/linuxkpi/common/include/linux/io.h
+++ b/sys/compat/linuxkpi/common/include/linux/io.h
@@ -35,6 +35,7 @@
 #include <machine/vm.h>
 
 #include <linux/compiler.h>
+#include <linux/err.h>
 #include <linux/types.h>
 #if !defined(__arm__)
 #include <asm/set_memory.h>
@@ -528,6 +529,8 @@
 	iounmap(addr);
 }
 
+#define	IOMEM_ERR_PTR(err)	(void __iomem *)ERR_PTR(err)
+
 #define	__MTRR_ID_BASE	1
 int lkpi_arch_phys_wc_add(unsigned long, unsigned long);
 void lkpi_arch_phys_wc_del(int);