diff --git a/eos/effects/thermodynamicsskilldamagebonus.py b/eos/effects/thermodynamicsskilldamagebonus.py
index 54569b06a..0386ad6e6 100644
--- a/eos/effects/thermodynamicsskilldamagebonus.py
+++ b/eos/effects/thermodynamicsskilldamagebonus.py
@@ -6,5 +6,5 @@ type = "passive"
 
 
 def handler(fit, skill, context):
-    fit.modules.filteredItemBoost(lambda mod: True, "heatDamage",
+    fit.modules.filteredItemBoost(lambda mod: "heatDamage" in mod.item.attributes, "heatDamage",
                                   skill.getModifiedItemAttr("thermodynamicsHeatDamage") * skill.level)