diff --git a/klibc/klibc/SYSCALLS b/klibc/klibc/SYSCALLS
index 1ec94acec6..802f8a1711 100644
--- a/klibc/klibc/SYSCALLS
+++ b/klibc/klibc/SYSCALLS
@@ -103,6 +103,7 @@ int poll(struct pollfd *, nfds_t, long)
 int fsync(int)
 int readv(int, const struct iovec *, int)
 int writev(int, const struct iovec *, int)
+int ftruncate(int, off_t)
 
 #
 # Signal operations