1 files changed, 6 insertions, 4 deletions

diff --git a/linden/indra/llcommon/indra_constants.h b/linden/indra/llcommon/indra_constants.h
index 9024b12..21635b5 100644
--- a/linden/indra/llcommon/indra_constants.h
+++ b/linden/indra/llcommon/indra_constants.h
@@ -130,10 +130,12 @@ const	char	CLOUD_LAYER_CODE				= '8';
 
 // keys
 // Bit masks for various keyboard modifier keys.
-const MASK MASK_NONE =          0x0000;
-const MASK MASK_CONTROL =       0x0001;
-const MASK MASK_ALT =           0x0002;
-const MASK MASK_SHIFT =         0x0004;
+const MASK MASK_NONE =                  0x0000;
+const MASK MASK_CONTROL =               0x0001;         // Mapped to cmd on Macs
+const MASK MASK_ALT =                   0x0002;
+const MASK MASK_SHIFT =                 0x0004;
+const MASK MASK_NORMALKEYS =    0x0007;     // A real mask - only get the bits for normal modifier keys
+const MASK MASK_MAC_CONTROL =   0x0008;         // Un-mapped Ctrl key on Macs, not used on Windows
 
 // Special keys go into >128
 const KEY KEY_SPECIAL = 0x80;   // special keys start here