diff --git a/code/modules/clothing/spacesuits/_spacesuits.dm b/code/modules/clothing/spacesuits/_spacesuits.dm
index 9a8a454af92..31fc1122316 100644
--- a/code/modules/clothing/spacesuits/_spacesuits.dm
+++ b/code/modules/clothing/spacesuits/_spacesuits.dm
@@ -1,4 +1,5 @@
-#define THERMAL_REGULATOR_COST 18 // the cost per tick for the thermal regulator
+/// Charge per tick consumed by the thermal regulator
+#define THERMAL_REGULATOR_COST (18 KILO JOULES)
 
 //Note: Everything in modules/clothing/spacesuits should have the entire suit grouped together.
 //      Meaning the the suit is defined directly after the corrisponding helmet. Just like below!