diff --git a/code/game/objects/structures/cannons/cannon.dm b/code/game/objects/structures/cannons/cannon.dm
index 5277e69cde5..f20c88e26bd 100644
--- a/code/game/objects/structures/cannons/cannon.dm
+++ b/code/game/objects/structures/cannons/cannon.dm
@@ -64,7 +64,7 @@
 		return
 
 	else if(ignition_message)
-		if(!reagents.has_reagent(/datum/reagent/gunpowder,charge_size) || !reagents.has_reagent(/datum/reagent/fuel,charge_size))
+		if(!reagents.has_reagent(/datum/reagent/gunpowder,charge_size) && !reagents.has_reagent(/datum/reagent/fuel,charge_size))
 			balloon_alert(user, "needs [reagents.maximum_volume]u of charge!")
 			return
 		visible_message(ignition_message)