diff --git a/src/main/java/org/embeddedt/modernfix/blockstate/BlockStateCacheHandler.java b/src/main/java/org/embeddedt/modernfix/blockstate/BlockStateCacheHandler.java
index 07a01858..2076f136 100644
--- a/src/main/java/org/embeddedt/modernfix/blockstate/BlockStateCacheHandler.java
+++ b/src/main/java/org/embeddedt/modernfix/blockstate/BlockStateCacheHandler.java
@@ -41,7 +41,8 @@ public class BlockStateCacheHandler {
 
     public static void rebuildParallel(boolean force) {
         if(currentRebuildThread != null) {
-            ModernFix.LOGGER.warn("Interrupting previous blockstate cache rebuild");
+            if(currentRebuildThread.isAlive())
+                ModernFix.LOGGER.warn("Interrupting previous blockstate cache rebuild");
             currentRebuildThread.stopRebuild();
             try {
                 currentRebuildThread.join(10000);