diff --git a/fmlloader/src/main/java/net/minecraftforge/fml/loading/ModDirTransformerDiscoverer.java b/fmlloader/src/main/java/net/minecraftforge/fml/loading/ModDirTransformerDiscoverer.java
index da0d2549f8..a5fe91d8fd 100644
--- a/fmlloader/src/main/java/net/minecraftforge/fml/loading/ModDirTransformerDiscoverer.java
+++ b/fmlloader/src/main/java/net/minecraftforge/fml/loading/ModDirTransformerDiscoverer.java
@@ -44,7 +44,7 @@ public class ModDirTransformerDiscoverer implements ITransformerDiscoveryService
     public void earlyInitialization(final String launchTarget, final String[] arguments) {
         boolean isMixinEnabledInDev = false;
         for (String arg : arguments) {
-            if (arg.startsWith("-mixin.config")) {
+            if (arg.startsWith("-mixin") || arg.startsWith("--mixin")) {
                 isMixinEnabledInDev = true;
                 break;
             }