diff --git a/1.5/Patches/patch_mod.xml b/1.5/Patches/patch_mod.xml
index 8d893a10..3b3228cb 100644
--- a/1.5/Patches/patch_mod.xml
+++ b/1.5/Patches/patch_mod.xml
@@ -88,4 +88,40 @@
 			</value>
 		</match>
 	</Operation>
+
+	<Operation Class="PatchOperationFindMod">
+		<mods>
+			<li>Combat Extended</li>
+		</mods>
+		<nomatch Class="PatchOperationAdd">
+			<xpath>Defs/ThingDef[defName="Apparel_SpaceSuitHelmet"]/apparel</xpath>
+			<value>
+				<immuneToToxGasExposure>true</immuneToToxGasExposure>
+			</value>
+		</nomatch>
+	</Operation>
+	
+	<Operation Class="PatchOperationFindMod">
+		<mods>
+			<li>Combat Extended</li>
+		</mods>
+		<nomatch Class="PatchOperationAdd">
+			<xpath>Defs/ThingDef[defName="Apparel_SpaceSuitHelmetChild"]/apparel</xpath>
+			<value>
+				<immuneToToxGasExposure>true</immuneToToxGasExposure>
+			</value>
+		</nomatch>
+	</Operation>
+	
+	<Operation Class="PatchOperationFindMod">
+		<mods>
+			<li>Combat Extended</li>
+		</mods>
+		<nomatch Class="PatchOperationAdd">
+			<xpath>Defs/ThingDef[defName="Apparel_SpaceSuitHelmetHeavy"]/apparel</xpath>
+			<value>
+				<immuneToToxGasExposure>true</immuneToToxGasExposure>
+			</value>
+		</nomatch>
+	</Operation>
 </Patch>