diff --git a/src/com/massivecraft/mcore/MCoreConf.java b/src/com/massivecraft/mcore/MCoreConf.java
index 14765ffa..8a0063a4 100644
--- a/src/com/massivecraft/mcore/MCoreConf.java
+++ b/src/com/massivecraft/mcore/MCoreConf.java
@@ -10,6 +10,7 @@ import org.bukkit.permissions.Permissible;
 import com.massivecraft.mcore.store.Entity;
 import com.massivecraft.mcore.util.MUtil;
 import com.massivecraft.mcore.util.PermUtil;
+import com.massivecraft.mcore.xlib.mongodb.WriteConcern;
 
 public class MCoreConf extends Entity<MCoreConf>
 {
@@ -61,6 +62,11 @@ public class MCoreConf extends Entity<MCoreConf>
 	public List<String> getDeleteFiles() { return this.deleteFiles == null ? new ArrayList<String>() : new ArrayList<String>(this.deleteFiles); }
 	public void setDeleteFiles(List<String> deleteFiles) { this.deleteFiles = deleteFiles == null ? new ArrayList<String>() : new ArrayList<String>(deleteFiles); this.changed(); }
 	
+	// Used in the MongoDB mstore driver.
+	private WriteConcern mongoDbWriteConcern = WriteConcern.ACKNOWLEDGED;
+	public WriteConcern getMongoDbWriteConcern() { return this.mongoDbWriteConcern; }
+	public void setMongoDbWriteConcern(WriteConcern mongoDbWriteConcern) { this.mongoDbWriteConcern = mongoDbWriteConcern; this.changed(); }
+	
 	// -------------------------------------------- //
 	// HELP ACCESS
 	// -------------------------------------------- //
diff --git a/src/com/massivecraft/mcore/store/DriverMongo.java b/src/com/massivecraft/mcore/store/DriverMongo.java
index 51e7131c..7aad2fa0 100644
--- a/src/com/massivecraft/mcore/store/DriverMongo.java
+++ b/src/com/massivecraft/mcore/store/DriverMongo.java
@@ -9,6 +9,7 @@ import java.util.Set;
 import java.util.AbstractMap.SimpleEntry;
 import java.util.Map.Entry;
 
+import com.massivecraft.mcore.MCoreConf;
 import com.massivecraft.mcore.xlib.gson.JsonElement;
 import com.massivecraft.mcore.xlib.mongodb.BasicDBObject;
 import com.massivecraft.mcore.xlib.mongodb.DB;
@@ -168,7 +169,7 @@ public class DriverMongo extends DriverAbstract
 		
 		GsonMongoConverter.gson2MongoObject(data, dbo);
 		
-		dbcoll.save(dbo);
+		dbcoll.save(dbo, MCoreConf.get().getMongoDbWriteConcern());
 
 		return mtime;
 	}
@@ -176,7 +177,8 @@ public class DriverMongo extends DriverAbstract
 	@Override
 	public void delete(Coll<?> coll, String id)
 	{
-		fixColl(coll).remove(new BasicDBObject(ID_FIELD, id));
+		DBCollection dbcoll = fixColl(coll);
+		dbcoll.remove(new BasicDBObject(ID_FIELD, id), MCoreConf.get().getMongoDbWriteConcern());
 	}
 
 	//----------------------------------------------//