diff --git a/src/main/java/vazkii/botania/common/block/subtile/generating/SubTileEntropinnyum.java b/src/main/java/vazkii/botania/common/block/subtile/generating/SubTileEntropinnyum.java
index 92a90e24c..bc4ecd736 100644
--- a/src/main/java/vazkii/botania/common/block/subtile/generating/SubTileEntropinnyum.java
+++ b/src/main/java/vazkii/botania/common/block/subtile/generating/SubTileEntropinnyum.java
@@ -101,6 +101,7 @@ public class SubTileEntropinnyum extends SubTileGenerating {
             if (world.isRemote || mana != 0 || !(Math.abs(supertile.xCoord - posX) <= RANGE && Math.abs(supertile.yCoord - posY) <= RANGE && Math.abs(supertile.zCoord - posZ) <= RANGE)) {
                 return false;
             }
+			if (explosionSource == null) return false;
 
             explosionSource.setDead();
             mana += getMaxMana();