diff --git a/include/arch/nios2/arch.h b/include/arch/nios2/arch.h
index cc676e89942..de859169f59 100644
--- a/include/arch/nios2/arch.h
+++ b/include/arch/nios2/arch.h
@@ -40,6 +40,11 @@ extern "C" {
 #define _NANO_ERR_ALLOCATION_FAIL (3)   /* Kernel Allocation Failure */
 #define _NANO_ERR_SPURIOUS_INT (4)	/* Spurious interrupt */
 
+/* APIs need to support non-byte addressible architectures */
+
+#define OCTET_TO_SIZEOFUNIT(X) (X)
+#define SIZEOFUNIT_TO_OCTET(X) (X)
+
 #ifndef _ASMLANGUAGE
 #include <stdint.h>
 #include <irq.h>