diff --git a/sp/src/game/server/items.h b/sp/src/game/server/items.h
index 53f440e8..6209c15e 100644
--- a/sp/src/game/server/items.h
+++ b/sp/src/game/server/items.h
@@ -89,9 +89,9 @@ public:
 #endif
 
 #ifdef MAPBASE
-	// This is in CBaseEntity, but I can't find a use for it anywhere.
-	// It may have been originally intended for TF2 or some other game-specific item class. Please remove this if it turns out to be something important.
-	virtual bool IsCombatItem() { return true; }
+	// This appeared to have no prior use in Source SDK 2013.
+	// It may have been originally intended for TF2 or some other game-specific item class.
+	virtual bool IsCombatItem() const { return true; }
 
 	// Used to access item_healthkit values, etc. from outside of the class
 	virtual float GetItemAmount() { return 1.0f; }