1 files changed, 1 insertions, 0 deletions

diff --git a/firmware/common/file.h b/firmware/common/file.h
index 7a7c63d665..59ff717d1d 100644
--- a/firmware/common/file.h
+++ b/firmware/common/file.h
@@ -56,6 +56,7 @@ extern int creat(const char *pathname, int mode);
 extern int write(int fd, void* buf, int count);
 extern int remove(const char* pathname);
 extern int rename(const char* oldname, const char* newname);
+extern int ftruncate(int fd, unsigned int size);
 
 #else
 #ifdef WIN32