diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c
index 3c65fc90bf233bdfe0d5ffd1b77e8a4842a5de4d..451f4f7a673d74e8ae93cee83f0c7c5a690a193e 100644
--- a/lib/tiny-printf.c
+++ b/lib/tiny-printf.c
@@ -130,6 +130,11 @@ abort:
 	return 0;
 }
 
+int vprintf(const char *fmt, va_list va)
+{
+	return _vprintf(fmt, va, putc);
+}
+
 int printf(const char *fmt, ...)
 {
 	va_list va;