diff --git a/src/arch/riscv/include/arch/io.h b/src/arch/riscv/include/arch/io.h
index 9f672f9505..5f66a239b4 100644
--- a/src/arch/riscv/include/arch/io.h
+++ b/src/arch/riscv/include/arch/io.h
@@ -14,6 +14,7 @@
 #ifndef _ASM_IO_H
 #define _ASM_IO_H
 
+#include <endian.h>
 #include <stdint.h>
 #include <compiler.h>