diff --git a/core/src/mindustry/world/blocks/storage/CoreBlock.java b/core/src/mindustry/world/blocks/storage/CoreBlock.java
index 24f5b6a652..20c42d8743 100644
--- a/core/src/mindustry/world/blocks/storage/CoreBlock.java
+++ b/core/src/mindustry/world/blocks/storage/CoreBlock.java
@@ -55,6 +55,7 @@ public class CoreBlock extends StorageBlock{
         envEnabled = Env.any;
         drawDisabled = false;
         replaceable = false;
+        rebuildable = false;
     }
 
     @Remote(called = Loc.server)