diff --git a/printf.c b/printf.c
index 8a700add..3dd36dae 100644
--- a/printf.c
+++ b/printf.c
@@ -912,3 +912,9 @@ int fctprintf(void (*out)(char character, void* arg), void* arg, const char* for
   va_end(va);
   return ret;
 }
+
+
+int fctvprintf(void (*out)(char character, void* arg), void* arg, const char* format, va_list va) {
+	const out_fct_wrap_type out_fct_wrap = { out, arg };
+	return _vsnprintf(_out_fct, (char*)(uintptr_t)&out_fct_wrap, (size_t)-1, format, va);
+}
diff --git a/printf.h b/printf.h
index 6104ccfb..7481e641 100644
--- a/printf.h
+++ b/printf.h
@@ -109,6 +109,17 @@ int vprintf_(const char* format, va_list va);
 int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...);
 
 
+/**
+ * vprintf with output function
+ * You may use this as dynamic alternative to vprintf() with its fixed _putchar() output
+ * \param out An output function which takes one character and an argument pointer
+ * \param arg An argument pointer for user data passed to output function
+ * \param va A value identifying a variable arguments list
+ * \return The number of characters that are sent to the output function, not counting the terminating null character
+ */
+int fctvprintf(void (*out)(char character, void* arg), void* arg, const char* format, va_list va);
+
+
 #ifdef __cplusplus
 }
 #endif