server: Check that the prefix type can support the client architecture.
diff --git a/server/object.h b/server/object.h
index 01dc00e..172c3f7 100644
--- a/server/object.h
+++ b/server/object.h
@@ -186,6 +186,7 @@
 
 /* registry functions */
 
+extern unsigned int get_prefix_cpu_mask(void);
 extern void init_registry(void);
 extern void flush_registry(void);