1 files changed, 2 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index ac2991e8..378c937a 100644
--- a/tmux.h
+++ b/tmux.h
@@ -91,9 +91,10 @@ struct tmuxproc;
 #define KEYC_ESCAPE 0x200000000000ULL
 #define KEYC_CTRL   0x400000000000ULL
 #define KEYC_SHIFT  0x800000000000ULL
+#define KEYC_XTERM 0x1000000000000ULL
 
 /* Mask to obtain key w/o modifiers. */
-#define KEYC_MASK_MOD (KEYC_ESCAPE|KEYC_CTRL|KEYC_SHIFT)
+#define KEYC_MASK_MOD (KEYC_ESCAPE|KEYC_CTRL|KEYC_SHIFT|KEYC_XTERM)
 #define KEYC_MASK_KEY (~KEYC_MASK_MOD)
 
 /* Is this a mouse key? */