diff --git a/include/asm-nios/io.h b/include/asm-nios/io.h
index 8b78806..899682c 100644
--- a/include/asm-nios/io.h
+++ b/include/asm-nios/io.h
@@ -133,4 +133,9 @@
 
 }
 
+static inline phys_addr_t virt_to_phys(void * vaddr)
+{
+	return (phys_addr_t)(vaddr);
+}
+
 #endif /* __ASM_NIOS_IO_H_ */