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-rw-r--r--databases/gnats/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/databases/gnats/Makefile b/databases/gnats/Makefile
index f4c8abd0f12e..68d4a214366e 100644
--- a/databases/gnats/Makefile
+++ b/databases/gnats/Makefile
@@ -23,6 +23,7 @@ CONFIGURE_ARGS= --with-lispdir=${PREFIX}/share/emacs/site-lisp \
--with-release-based
USE_GMAKE= yes
+USE_BISON= yes
MAN1= edit-pr.1 query-pr.1 send-pr.1
MAN7= gnats.7
MAN8= mkcat.8 rmcat.8 mkdist.8 queue-pr.8 file-pr.8 gen-index.8