--- a/src/upmpdutils.hxx
+++ b/src/upmpdutils.hxx
@@ -136,6 +136,7 @@
 extern bool ensureconfreadable(const char *fn, const char *user, uid_t uid,
                                gid_t gid);
 class ConfSimple;
-extern bool configBool(ConfSimple *conf, const std::string& nm);
+extern bool configBool(ConfSimple *conf, const std::string& nm,
+                       bool dflt = false);
 
 #endif /* _UPMPDUTILS_H_X_INCLUDED_ */