--- ../src-base/minecraft/net/minecraftforge/common/chunkio/ChunkIOExecutor.java
+++ ../src-work/minecraft/net/minecraftforge/common/chunkio/ChunkIOExecutor.java
@@ -22,7 +22,7 @@
     }
 
     public static void adjustPoolSize(int players) {
-        int size = Math.max(BASE_THREADS, (int) Math.ceil(players / PLAYERS_PER_THREAD));
+        int size = Math.max(BASE_THREADS, (int) Math.ceil((double) players / PLAYERS_PER_THREAD));
         instance.setActiveThreads(size);
     }