1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/gregtech/loaders/misc/GT_Achievements.java b/src/main/java/gregtech/loaders/misc/GT_Achievements.java
index a8b08d676b..981048cd6d 100644
--- a/src/main/java/gregtech/loaders/misc/GT_Achievements.java
+++ b/src/main/java/gregtech/loaders/misc/GT_Achievements.java
@@ -486,7 +486,7 @@ public class GT_Achievements {
             return;
         }
         ItemData data = GT_OreDictUnificator.getItemData(stack);
-        if (data != null) {
+        if (data != null && data.mPrefix!=null) {
             if (data.mPrefix == OrePrefixes.dust) {
                 if (data.mMaterial.mMaterial == Materials.Lutetium) {
                     issueAchievement(player, "newmetal");