diff --git a/usr.bin/truss/Makefile.depend.amd64 b/usr.bin/truss/Makefile.depend.amd64
index 2d6f867d4c8a..7c9eb58b782b 100644
--- a/usr.bin/truss/Makefile.depend.amd64
+++ b/usr.bin/truss/Makefile.depend.amd64
@@ -6,6 +6,7 @@ DIRDEPS = \
 	gnu/lib/libgcc \
 	include \
 	include/arpa \
+	include/rpc \
 	include/xlocale \
 	lib/${CSU_DIR} \
 	lib/libc \