1 files changed, 1 insertions, 0 deletions
diff --git a/tmux.h b/tmux.h
index f0f17eaa..e88eac0f 100644
--- a/tmux.h
+++ b/tmux.h
@@ -138,6 +138,7 @@ struct winlink;
 #define KEYC_IMPLIED_META    0x08000000000000ULL
 #define KEYC_BUILD_MODIFIERS 0x10000000000000ULL
 #define KEYC_VI              0x20000000000000ULL
+#define KEYC_EXTENDED        0x40000000000000ULL
 
 /* Masks for key bits. */
 #define KEYC_MASK_MODIFIERS  0x00f00000000000ULL