diff --git a/src/debug.h b/src/debug.h
--- a/src/debug.h
+++ b/src/debug.h
@@ -51,6 +51,9 @@
 	extern int _debug_gamelog_level;
 	extern int _debug_desync_level;
 	extern int _debug_console_level;
+#ifdef RANDOM_DEBUG
+	extern int _debug_random_level;
+#endif
 
 	void CDECL debug(const char *dbg, const char *format, ...) WARN_FORMAT(2, 3);
 #endif /* NO_DEBUG_MESSAGES */