diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index 09103b3d8f05..c9bdf544ed2c 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -62,7 +62,7 @@
 
 static inline unsigned char *alloc_buf(void)
 {
-	int prio = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
+	unsigned int prio = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
 
 	if (PAGE_SIZE != N_TTY_BUF_SIZE)
 		return kmalloc(N_TTY_BUF_SIZE, prio);