2 files changed, 8 insertions, 7 deletions
diff --git a/src/main/java/gregtech/api/world/GT_Worldgen.java b/src/main/java/gregtech/api/world/GT_Worldgen.java
index e41e2abefe..e464c475f1 100644
--- a/src/main/java/gregtech/api/world/GT_Worldgen.java
+++ b/src/main/java/gregtech/api/world/GT_Worldgen.java
@@ -4,16 +4,16 @@ import gregtech.api.GregTech_API;
 import net.minecraft.world.World;
 import net.minecraft.world.chunk.IChunkProvider;
 
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Random;
+import java.util.concurrent.ConcurrentHashMap;
 
 public abstract class GT_Worldgen {
 
     public final String mWorldGenName;
     public final boolean mEnabled;
-    private final Map<String, Boolean> mDimensionMap = new HashMap<String, Boolean>();
+    private final Map<String, Boolean> mDimensionMap = new ConcurrentHashMap<String, Boolean>();
 
     public GT_Worldgen(String aName, List aList, boolean aDefault) {
         mWorldGenName = aName;
diff --git a/src/main/java/gregtech/api/world/GT_Worldgen_Ore.java b/src/main/java/gregtech/api/world/GT_Worldgen_Ore.java
index bdba08bfb2..e8d16526c1 100644
--- a/src/main/java/gregtech/api/world/GT_Worldgen_Ore.java
+++ b/src/main/java/gregtech/api/world/GT_Worldgen_Ore.java
@@ -11,17 +11,18 @@ public abstract class GT_Worldgen_Ore extends GT_Worldgen {
     public final Block mBlock;
     public final Collection<String> mBiomeList;
     public final boolean mAllowToGenerateinVoid;
+    private final String aTextWorldgen = "worldgen.";
 
     public GT_Worldgen_Ore(String aName, boolean aDefault, Block aBlock, int aBlockMeta, int aDimensionType, int aAmount, int aSize, int aProbability, int aMinY, int aMaxY, Collection<String> aBiomeList, boolean aAllowToGenerateinVoid) {
         super(aName, GregTech_API.sWorldgenList, aDefault);
         mDimensionType = aDimensionType;
         mBlock = aBlock;
         mBlockMeta = Math.min(Math.max(aBlockMeta, 0), 15);
-        mProbability = GregTech_API.sWorldgenFile.get("worldgen." + mWorldGenName, "Probability", aProbability);
-        mAmount = GregTech_API.sWorldgenFile.get("worldgen." + mWorldGenName, "Amount", aAmount);
-        mSize = GregTech_API.sWorldgenFile.get("worldgen." + mWorldGenName, "Size", aSize);
-        mMinY = GregTech_API.sWorldgenFile.get("worldgen." + mWorldGenName, "MinHeight", aMinY);
-        mMaxY = GregTech_API.sWorldgenFile.get("worldgen." + mWorldGenName, "MaxHeight", aMaxY);
+        mProbability = GregTech_API.sWorldgenFile.get(aTextWorldgen + mWorldGenName, "Probability", aProbability);
+        mAmount = GregTech_API.sWorldgenFile.get(aTextWorldgen + mWorldGenName, "Amount", aAmount);
+        mSize = GregTech_API.sWorldgenFile.get(aTextWorldgen + mWorldGenName, "Size", aSize);
+        mMinY = GregTech_API.sWorldgenFile.get(aTextWorldgen + mWorldGenName, "MinHeight", aMinY);
+        mMaxY = GregTech_API.sWorldgenFile.get(aTextWorldgen + mWorldGenName, "MaxHeight", aMaxY);
         if (aBiomeList == null) mBiomeList = new ArrayList<String>();
         else mBiomeList = aBiomeList;
         mAllowToGenerateinVoid = aAllowToGenerateinVoid;