diff --git a/1.5/Mods/Paniel_Experimental/Defs/HediffDefs/HediffDef_PNE_BodyParts.xml b/1.5/Mods/Paniel_Experimental/Defs/HediffDefs/HediffDef_PNE_BodyParts.xml
index 1a548e2..e06d358 100644
--- a/1.5/Mods/Paniel_Experimental/Defs/HediffDefs/HediffDef_PNE_BodyParts.xml
+++ b/1.5/Mods/Paniel_Experimental/Defs/HediffDefs/HediffDef_PNE_BodyParts.xml
@@ -41,6 +41,7 @@
       <Mass>0.3</Mass>
     </statBases>
     <recipeMaker>
+      <researchPrerequisite>PNRP_TierC_Parts</researchPrerequisite>
     </recipeMaker>
   </ThingDef>
 
@@ -98,6 +99,7 @@
       <Mass>0.3</Mass>
     </statBases>
     <recipeMaker>
+      <researchPrerequisite>PNRP_TierC_Parts</researchPrerequisite>
     </recipeMaker>
   </ThingDef>