diff --git a/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java b/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java
index cd5a90fee..a59ca265c 100644
--- a/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java
+++ b/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java
@@ -272,7 +272,7 @@ public void run() throws IOException {
 
 				if (!mixinConfigs.isEmpty()) {
 					for (String config : mixinConfigs) {
-						launchConfig.argument("-mixin.config");
+						launchConfig.argument("--mixin.config");
 						launchConfig.argument(config);
 					}
 				}