diff --git a/etc/options b/etc/options
index 4d5364e4f7339d1802d97b281f026f47e73fa5ca..ddaebf93d4b82b3448fcb9c4697105abd30b4280 100644
--- a/etc/options
+++ b/etc/options
@@ -570,6 +570,7 @@ extra_qualifiers_gff = \
     polypeptide_domain "text" \
     previous_systematic_id "text" \
     primary_name "text" \
+    product_synonym "text" \
     similarity "text" \
     stop_codon_redefined_as_selenocysteine none \
     synonym "text" \