diff --git a/newlib/libc/include/sys/config.h b/newlib/libc/include/sys/config.h
index 2082dfdb1..49b62ebf6 100644
--- a/newlib/libc/include/sys/config.h
+++ b/newlib/libc/include/sys/config.h
@@ -108,7 +108,7 @@
 #define _POINTER_INT short
 #endif
 
-#ifdef __v850
+#if defined(__v850) && !defined(__rtems__)
 #define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__sda__))
 #endif