diff --git a/cf/roken-frag.m4 b/cf/roken-frag.m4
index e0c3a05f7..6249adfea 100644
--- a/cf/roken-frag.m4
+++ b/cf/roken-frag.m4
@@ -337,6 +337,7 @@ AC_BROKEN([					\
 	strtok_r				\
 	strupr					\
 	swab					\
+	timegm					\
 	unsetenv				\
 	verr					\
 	verrx					\