src/functional/swprintf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/functional/swprintf.c b/src/functional/swprintf.c
index 2abcb7c..07b25e0 100644
--- a/src/functional/swprintf.c
+++ b/src/functional/swprintf.c
@@ -41,7 +41,7 @@ static const struct {
 	{ L"%.0d", 0, L"" },
 	{ L"%.0o", 0, L"" },
 	{ L"%#.0d", 0, L"" },
-	{ L"%#.0o", 0, L"" },
+	{ L"%#.0o", 0, L"0" },
 	{ L"%#.0x", 0, L"" },
 
 	/* hex: test alt form and case */