diff --git a/cf/roken-frag.m4 b/cf/roken-frag.m4
index c75936b51..f94f20fb1 100644
--- a/cf/roken-frag.m4
+++ b/cf/roken-frag.m4
@@ -168,6 +168,7 @@ AC_CHECK_FUNCS([				\
 	getrlimit				\
 	getspnam				\
 	initstate				\
+	random					\
 	setprogname				\
 	setstate				\
 	strsvis					\