diff --git a/util/Platform.java b/util/Platform.java
index a451060e5..056dee6a4 100644
--- a/util/Platform.java
+++ b/util/Platform.java
@@ -299,6 +299,10 @@ public class Platform
 			z = tile.zCoord;
 		}
 
+		// valid tile?
+		if ( !type.CorrectTileOrPart( tile ) )
+			tile = null;
+
 		if ( (type.getType().isItem() && tile == null) || type.hasPermissions( tile, x, y, z, side, p ) )
 		{
 			if ( tile == null )