diff --git a/Content.Server/Chemistry/TileReactions/FlammableTileReaction.cs b/Content.Server/Chemistry/TileReactions/FlammableTileReaction.cs
index dd0b4960ef..0463bb0f46 100644
--- a/Content.Server/Chemistry/TileReactions/FlammableTileReaction.cs
+++ b/Content.Server/Chemistry/TileReactions/FlammableTileReaction.cs
@@ -28,7 +28,7 @@ namespace Content.Server.Chemistry.TileReactions
             if (environment == null || !atmosphereSystem.IsHotspotActive(tile.GridUid, tile.GridIndices))
                 return FixedPoint2.Zero;
 
-            environment.Temperature *= MathF.Max(_temperatureMultiplier * reactVolume.Float(), 1f);
+            environment.Temperature += MathF.Max(_temperatureMultiplier * reactVolume.Float(), 1f);
             atmosphereSystem.ReactTile(tile.GridUid, tile.GridIndices);
 
             return reactVolume;