diff --git a/etc/options b/etc/options
index ddaebf93d4b82b3448fcb9c4697105abd30b4280..a7d4b10aacc8b782ce15d8774bc3577c239df622 100644
--- a/etc/options
+++ b/etc/options
@@ -564,6 +564,7 @@ extra_qualifiers_gff = \
     GO "text" \
     isFminPartial none \
     isFmaxPartial none \
+    literature "text" \
     note "text" \
     orthologous_to "text" \
     paralogous_to "text" \