diff --git a/core/assets/bundles/bundle.properties b/core/assets/bundles/bundle.properties
index 840e2f4623..da58c45a0d 100644
--- a/core/assets/bundles/bundle.properties
+++ b/core/assets/bundles/bundle.properties
@@ -1530,7 +1530,7 @@ liquid.slag.description = Refined in separators into constituent metals. Consume
 liquid.oil.description = Used in advanced material production and as incendiary ammunition.
 liquid.cryofluid.description = Used as coolant in reactors, turrets and factories.
 
-block.derelict =  [lightgray]Derelict
+block.derelict = \uf77e [lightgray]Derelict
 block.armored-conveyor.description = Moves items forward. Does not accept non-conveyor inputs from the sides.
 block.illuminator.description = Emits light.
 block.message.description = Stores a message for communication between allies.
diff --git a/core/src/mindustry/world/blocks/storage/CoreBlock.java b/core/src/mindustry/world/blocks/storage/CoreBlock.java
index e1e251d0cb..afcfb74d2e 100644
--- a/core/src/mindustry/world/blocks/storage/CoreBlock.java
+++ b/core/src/mindustry/world/blocks/storage/CoreBlock.java
@@ -131,15 +131,16 @@ public class CoreBlock extends StorageBlock{
         if(state.isEditor()) return true;
 
         CoreBuild core = team.core();
-        //must have all requirements
-        if(core == null || (!state.rules.infiniteResources && !core.items.has(requirements, state.rules.buildCostMultiplier))) return false;
 
         //special floor upon which cores can be placed
         tile.getLinkedTilesAs(this, tempTiles);
-        if(!tempTiles.contains(o -> !o.floor().allowCorePlacement)){
+        if(!tempTiles.contains(o -> !o.floor().allowCorePlacement || o.block() instanceof CoreBlock)){
             return true;
         }
 
+        //must have all requirements
+        if(core == null || (!state.rules.infiniteResources && !core.items.has(requirements, state.rules.buildCostMultiplier))) return false;
+
         return tile.block() instanceof CoreBlock && size > tile.block().size;
     }