diff --git a/JavaApp/src/main/java/net/kdt/pojavlaunch/Tools.java b/JavaApp/src/main/java/net/kdt/pojavlaunch/Tools.java
index de122b52..e10f45e2 100644
--- a/JavaApp/src/main/java/net/kdt/pojavlaunch/Tools.java
+++ b/JavaApp/src/main/java/net/kdt/pojavlaunch/Tools.java
@@ -161,7 +161,7 @@ public final class Tools
         varArgMap.put("auth_session", profile.accessToken); // For legacy versions of MC
         varArgMap.put("auth_access_token", profile.accessToken);
         varArgMap.put("auth_player_name", username);
-        varArgMap.put("auth_uuid", profile.profileId);
+        varArgMap.put("auth_uuid", profile.profileId.replace("-", ""));
         varArgMap.put("auth_xuid", profile.xuid);
         varArgMap.put("assets_root", Tools.ASSETS_PATH);
         varArgMap.put("assets_index_name", versionInfo.assets);