diff --git a/net/ntp/Makefile b/net/ntp/Makefile
--- a/net/ntp/Makefile
+++ b/net/ntp/Makefile
@@ -10,6 +10,7 @@
 WWW=		https://www.ntp.org/
 
 LIB_DEPENDS=	libevent.so:devel/libevent
+BUILD_DPENDS=	autogen:devel/autogen
 
 CONFLICTS=	ntpsec openntpd