diff --git a/finddeps.in b/finddeps.in
index 3f4515b..4651fd9 100644
--- a/finddeps.in
+++ b/finddeps.in
@@ -16,7 +16,7 @@ fi
 
 find . -type d | while read d; do
 	if [[ -f "$d/PKGBUILD" ]]; then
-		unset pkgname depends makedepends
+		unset pkgname depends makedepends optdepends
 		. "$d/PKGBUILD"
 		for dep in "${depends[@]}"; do
 			# lose the version comparator, if any