diff --git a/core/src/mindustry/world/blocks/payloads/Constructor.java b/core/src/mindustry/world/blocks/payloads/Constructor.java
index 4359fd581d..b6be3779dc 100644
--- a/core/src/mindustry/world/blocks/payloads/Constructor.java
+++ b/core/src/mindustry/world/blocks/payloads/Constructor.java
@@ -29,6 +29,7 @@ public class Constructor extends BlockProducer{
                 tile.recipe = block;
             }
         });
+        configClear((ConstructorBuild tile) -> tile.recipe = null);
     }
 
     @Override