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-rw-r--r--ports/unix/fatfs_port.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ports/unix/fatfs_port.c b/ports/unix/fatfs_port.c
index 4ec5b919a..9e0f444ce 100644
--- a/ports/unix/fatfs_port.c
+++ b/ports/unix/fatfs_port.c
@@ -5,7 +5,7 @@ DWORD get_fattime(void) {
time_t now = time(NULL);
struct tm *tm = localtime(&now);
return ((1900 + tm->tm_year - 1980) << 25)
- | (tm->tm_mon << 21)
+ | ((tm->tm_mon + 1) << 21)
| (tm->tm_mday << 16)
| (tm->tm_hour << 11)
| (tm->tm_min << 5)