diff --git a/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/core/BootstrapMixin.java b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/core/BootstrapMixin.java
index 428145b7..89709891 100644
--- a/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/core/BootstrapMixin.java
+++ b/forge/src/main/java/org/embeddedt/modernfix/forge/mixin/core/BootstrapMixin.java
@@ -1,6 +1,7 @@
 package org.embeddedt.modernfix.forge.mixin.core;
 
 import net.minecraft.server.Bootstrap;
+import net.minecraftforge.network.NetworkConstants;
 import org.slf4j.Logger;
 import org.embeddedt.modernfix.forge.load.ModWorkManagerQueue;
 import org.spongepowered.asm.mixin.Final;
@@ -23,4 +24,11 @@ public class BootstrapMixin {
             ModWorkManagerQueue.replace();
         }
     }
+
+    /* for https://github.com/MinecraftForge/MinecraftForge/issues/9505 */
+    @Inject(method = "bootStrap", at = @At("RETURN"))
+    private static void doClassloadHack(CallbackInfo ci) {
+        NetworkConstants.init();
+        LOGGER.info("Worked around Forge issue #9505");
+    }
 }