diff --git a/src/main/java/io/gitlab/jfronny/respackopts/util/RpoCommand.java b/src/main/java/io/gitlab/jfronny/respackopts/util/RpoCommand.java
index 1ae9f71..3de9841 100644
--- a/src/main/java/io/gitlab/jfronny/respackopts/util/RpoCommand.java
+++ b/src/main/java/io/gitlab/jfronny/respackopts/util/RpoCommand.java
@@ -21,7 +21,7 @@ public class RpoCommand {
     private static final ModContainer respackotps = FabricLoader.getInstance().getModContainer(RpoModInfo.ID).get();
     public static void register() {
         DISPATCHER.register(literal("rpo").then(literal("dump").then(literal("frex").executes(ctx -> {
-            ctx.getSource().sendFeedback(dump(FrexCompat.generateShader(), "frex.frag"));
+            ctx.getSource().sendFeedback(dump(FrexCompat.generateShader(), "frex.glsl"));
             return 1;
         }))));
         DISPATCHER.register(literal("rpo").then(literal("dump").then(literal("config").executes(ctx -> {