1 files changed, 1 insertions, 0 deletions

diff --git a/firmware/include/sprintf.h b/firmware/include/sprintf.h
index ecbbc8a419..61a5f5139f 100644
--- a/firmware/include/sprintf.h
+++ b/firmware/include/sprintf.h
@@ -25,5 +25,6 @@
 
 int snprintf (char *buf, size_t size, const char *fmt, ...);
 int vsnprintf (char *buf, int size, const char *fmt, va_list ap);
+int fprintf (int fd, const char *fmt, ...);
 
 #endif /* __SPRINTF_H__ */