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-rw-r--r--os/various/syscalls.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/os/various/syscalls.c b/os/various/syscalls.c
index 23bfea419..8f45a5dd2 100644
--- a/os/various/syscalls.c
+++ b/os/various/syscalls.c
@@ -107,7 +107,9 @@ int _lseek_r(struct _reent *r, int file, int ptr, int dir)
int _write_r(struct _reent *r, int file, char * ptr, int len)
{
+#if defined(STDOUT_SD)
int n;
+#endif
(void)r;
(void)file;