1 files changed, 1 insertions, 0 deletions

diff --git a/firmware/include/file.h b/firmware/include/file.h
index 75c55bbac9..1a2f8e55be 100644
--- a/firmware/include/file.h
+++ b/firmware/include/file.h
@@ -64,6 +64,7 @@ extern int write(int fd, void* buf, int count);
 extern int remove(const char* pathname);
 extern int rename(const char* path, const char* newname);
 extern int ftruncate(int fd, unsigned int size);
+extern int filesize(int fd);
 #endif /* SIMULATOR */
 #endif /* __MINGW32__ */