diff --git a/RSIO.md b/RSIO.md
index 5272741..b6cf0fc 100644
--- a/RSIO.md
+++ b/RSIO.md
@@ -35,7 +35,7 @@ local IO_PORT = {
     R_AUTO_CTRL   = 13, -- active high, if the reactor burn rate is automatic
     R_SCRAMMED    = 14, -- active high, if the reactor is scrammed
     R_AUTO_SCRAM  = 15, -- active high, if the reactor was automatically scrammed
-    R_DMG_CRIT    = 16, -- active high, if the reactor damage is critical
+    R_DMG_HIGH    = 16, -- active high, if the reactor damage is high
     R_HIGH_TEMP   = 17, -- active high, if the reactor is at a high temperature
     R_NO_COOLANT  = 18, -- active high, if the reactor has no coolant
     R_EXCESS_HC   = 19, -- active high, if the reactor has excess heated coolant