diff --git a/core/assets/version.properties b/core/assets/version.properties
index cb025c0787..85f79a50d7 100644
--- a/core/assets/version.properties
+++ b/core/assets/version.properties
@@ -1,7 +1,7 @@
 #Autogenerated file. Do not modify.
-#Sun Apr 08 21:39:05 EDT 2018
+#Mon Apr 09 10:25:51 EDT 2018
 version=release
-androidBuildCode=889
+androidBuildCode=891
 name=Mindustry
 code=3.5
 build=custom build
diff --git a/core/src/io/anuke/mindustry/world/Block.java b/core/src/io/anuke/mindustry/world/Block.java
index 1398ece612..9dd930c7d4 100644
--- a/core/src/io/anuke/mindustry/world/Block.java
+++ b/core/src/io/anuke/mindustry/world/Block.java
@@ -279,6 +279,12 @@ public class Block extends BaseBlock {
 	}
 	
 	public static Block getByID(int id){
+	    if(id < 0){
+	        id += 256;
+        }
+        if(id >= blocks.size || id < 0){
+	    	throw new RuntimeException("No block with ID '" + id + "' found!");
+		}
 		return blocks.get(id);
 	}