1 files changed, 2 insertions, 2 deletions

diff --git a/arch/um/drivers/slip.h b/arch/um/drivers/slip.h
index 495f2f1b1420..d523618cd5ac 100644
--- a/arch/um/drivers/slip.h
+++ b/arch/um/drivers/slip.h
@@ -12,8 +12,8 @@ struct slip_data {
         char *addr;
         char *gate_addr;
         int slave;
-        char ibuf[ENC_BUF_SIZE];
-        char obuf[ENC_BUF_SIZE];
+        unsigned char ibuf[ENC_BUF_SIZE];
+        unsigned char obuf[ENC_BUF_SIZE];
         int more; /* more data: do not read fd until ibuf has been drained */
         int pos;
         int esc;