diff --git a/sys/kern/uipc_syscalls.c b/sys/kern/uipc_syscalls.c
index 7b9322f4..ba7914b5 100644
--- a/sys/kern/uipc_syscalls.c
+++ bb/sys/kern/uipc_syscalls.c
@@ -1591,7 +1591,7 @@ sys_sendfile(struct sysmsg *sysmsg, const struct sendfile_args *uap)
 	size_t hbytes = 0;
 	size_t tbytes;
 	off_t hdtr_size = 0;
-	off_t sbytes;
+	off_t sbytes = 0;
 	int error;
 
 	/*