diff --git a/src/main/java/land/chipmunk/chipmunkbot/plugins/CommandCore.java b/src/main/java/land/chipmunk/chipmunkbot/plugins/CommandCore.java
index a6e035e..49c1397 100644
--- a/src/main/java/land/chipmunk/chipmunkbot/plugins/CommandCore.java
+++ b/src/main/java/land/chipmunk/chipmunkbot/plugins/CommandCore.java
@@ -219,9 +219,11 @@ public class CommandCore extends SessionAdapter {
     currentBlockRelative = null;
     ready = false;
 
-    refillTimer.cancel();
-    refillTimer.purge();
-    refillTimer = null;
+    if (refillTimer != null) {
+      refillTimer.cancel();
+      refillTimer.purge();
+      refillTimer = null;
+    }
   }
 
   public static class Listener {