diff --git a/lib/roken/roken-common.h b/lib/roken/roken-common.h
index bb19de510..ca9f2c3cd 100644
--- a/lib/roken/roken-common.h
+++ b/lib/roken/roken-common.h
@@ -290,5 +290,8 @@ vstrcollect(va_list *ap);
 char **
 strcollect(char *first, ...);
 
+void timevalfix(struct timeval *t1);
+void timevaladd(struct timeval *t1, const struct timeval *t2);
+void timevalsub(struct timeval *t1, const struct timeval *t2);
 
 #endif /* __ROKEN_COMMON_H__ */