diff --git a/input-keys.c b/input-keys.c
index b47eea6e..f6bc77e9 100644
--- a/input-keys.c
+++ b/input-keys.c
@@ -595,7 +595,7 @@ input_key(struct screen *s, struct bufferevent *bev, key_code key)
 
 	/* Is this backtab? */
 	if ((key & KEYC_MASK_KEY) == KEYC_BTAB) {
-		if ((s->mode & EXTENDED_KEY_MODES) != 0) {
+		if (s->mode & MODE_KEYS_EXTENDED_2) {
 			/* When in xterm extended mode, remap into S-Tab. */
 			key = '\011' | (key & ~KEYC_MASK_KEY) | KEYC_SHIFT;
 		} else {