diff --git a/core/src/mindustry/world/blocks/payloads/PayloadLoader.java b/core/src/mindustry/world/blocks/payloads/PayloadLoader.java
index 04c2d7c60b..eb5ba0c802 100644
--- a/core/src/mindustry/world/blocks/payloads/PayloadLoader.java
+++ b/core/src/mindustry/world/blocks/payloads/PayloadLoader.java
@@ -62,6 +62,7 @@ public class PayloadLoader extends PayloadBlock{
         @Override
         public boolean acceptPayload(Building source, Payload payload){
             return super.acceptPayload(source, payload) &&
+                payload.size() <= maxBlockSize &&
                 payload instanceof BuildPayload build &&
                 ((build.build.block.hasItems && build.block().unloadable && build.block().itemCapacity >= 10 && build.block().size <= maxBlockSize) ||
                 build.build.block().hasLiquids && build.block().liquidCapacity >= 10f);