diff --git a/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java b/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
index a9e6dc44..9777a897 100644
--- a/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
+++ b/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
@@ -30,7 +30,7 @@ public class ModernFixEarlyConfig {
         this.addMixinRule("perf.async_jei", true);
         this.addMixinRule("perf.thread_priorities", true);
         this.addMixinRule("perf.preload_block_classes", true);
-        this.addMixinRule("perf.parallel_potentially_unsafe", true);
+        this.addMixinRule("perf.parallel_potentially_unsafe", false);
 
         /* Mod compat */
         if(FMLLoader.getLoadingModList().getModFileById("smoothboot") != null) {