diff --git a/code/defines/obj/computer.dm b/code/defines/obj/computer.dm
index c8e3442f934..82074ad7aa5 100644
--- a/code/defines/obj/computer.dm
+++ b/code/defines/obj/computer.dm
@@ -114,7 +114,7 @@
 
 /obj/machinery/computer/atmosphere/siphonswitch/mastersiphonswitch
 	name = "Master Air Control"
-
+	desc = "Emergancy global overrides for the entire atmospherics system."
 
 /obj/machinery/computer/dna
 	name = "DNA operations computer"