diff --git a/lib/libbsnmp/Makefile b/lib/libbsnmp/Makefile
index 453cba29ddf5..cd0894d1b123 100644
--- a/lib/libbsnmp/Makefile
+++ b/lib/libbsnmp/Makefile
@@ -1,5 +1,7 @@
 # $FreeBSD$
 
+.include <src.opts.mk>
+
 SUBDIR=	libbsnmp
 SUBDIR.${MK_TESTS}+= tests