diff --git a/core/src/mindustry/content/TechTree.java b/core/src/mindustry/content/TechTree.java
index 30d6c60207..cf77c5819b 100644
--- a/core/src/mindustry/content/TechTree.java
+++ b/core/src/mindustry/content/TechTree.java
@@ -510,6 +510,7 @@ public class TechTree implements ContentList{
                                     new SectorComplete(windsweptIslands),
                                     new Research(commandCenter),
                                     new Research(groundFactory),
+                                    new Research(additiveReconstructor),
                                     new Research(airFactory),
                                     new Research(door),
                                     new Research(waterExtractor)