1 files changed, 1 insertions, 0 deletions

diff --git a/.SRCINFO b/.SRCINFO
index 2466aae39b90..80358618f237 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -11,6 +11,7 @@ pkgbase = gtirb-git
 	makedepends = doxygen
 	makedepends = graphviz
 	optdepends = boost: build against system boost
+	optdepends = protobuf: multi-language access to serialized GTIRB
 	provides = gtirb
 	source = git://github.com/grammatech/gtirb.git
 	sha512sums = SKIP