diff --git a/fio.h b/fio.h
index ba68067..04963cd 100644
--- a/fio.h
+++ b/fio.h
@@ -701,4 +701,7 @@
 		pthread_cond_signal(&td->free_cond);
 }
 
+extern const char *fio_get_arch_string(int);
+extern const char *fio_get_os_string(int);
+
 #endif