diff --git a/src/ResearchTree/NodeIDs.h b/src/ResearchTree/NodeIDs.h
index fd0ca96..7846704 100644
--- a/src/ResearchTree/NodeIDs.h
+++ b/src/ResearchTree/NodeIDs.h
@@ -97,7 +97,7 @@ enum OSIDs: Int {
     ImprovedNeuralOS,
     EnhancedSkeletonOS,
     ExtendedArtsLibrary,
-    SustainableShield1,
+    SustainableShields1,
     Shields2,
     SustainableRecharger1,
     Enhancements2,