diff --git a/fml/src/main/java/cpw/mods/fml/client/GuiOldSaveLoadConfirm.java b/fml/src/main/java/cpw/mods/fml/client/GuiOldSaveLoadConfirm.java
index 6c509543cc..d1175b7eb2 100644
--- a/fml/src/main/java/cpw/mods/fml/client/GuiOldSaveLoadConfirm.java
+++ b/fml/src/main/java/cpw/mods/fml/client/GuiOldSaveLoadConfirm.java
@@ -66,7 +66,16 @@ public class GuiOldSaveLoadConfirm extends GuiYesNo implements GuiYesNoCallback
             FMLLog.info("Capturing current state of world %s into file %s", saveName, zip.getAbsolutePath());
             try
             {
-                ZipperUtil.zip(new File(FMLClientHandler.instance().getSavesDir(), dirName), zip);
+                String skip = System.getProperty("fml.doNotBackup");
+                if (skip == null || !"true".equals(skip))
+                {
+                    ZipperUtil.zip(new File(FMLClientHandler.instance().getSavesDir(), dirName), zip);
+                }
+                else
+                {
+                    for (int x = 0; x < 10; x++)
+                        FMLLog.severe("!!!!!!!!!! UPDATING WORLD WITHOUT DOING BACKUP !!!!!!!!!!!!!!!!");
+                }
             } catch (IOException e)
             {
                 FMLLog.log(Level.WARN, e, "There was a problem saving the backup %s. Please fix and try again", zip.getName());
diff --git a/fml/src/main/java/cpw/mods/fml/common/registry/GameData.java b/fml/src/main/java/cpw/mods/fml/common/registry/GameData.java
index d253fd042a..aa52b74f57 100644
--- a/fml/src/main/java/cpw/mods/fml/common/registry/GameData.java
+++ b/fml/src/main/java/cpw/mods/fml/common/registry/GameData.java
@@ -369,7 +369,16 @@ public class GameData {
         // backup
         try
         {
-            ZipperUtil.backupWorld();
+            String skip = System.getProperty("fml.doNotBackup");
+            if (skip == null || !"true".equals(skip))
+            {
+                ZipperUtil.backupWorld();
+            }
+            else
+            {
+                for (int x = 0; x < 10; x++)
+                    FMLLog.severe("!!!!!!!!!! UPDATING WORLD WITHOUT DOING BACKUP !!!!!!!!!!!!!!!!");
+            }
         }
         catch (IOException e)
         {
@@ -618,7 +627,16 @@ public class GameData {
 
             try
             {
-                ZipperUtil.backupWorld();
+                String skip = System.getProperty("fml.doNotBackup");
+                if (skip == null || !"true".equals(skip))
+                {
+                    ZipperUtil.backupWorld();
+                }
+                else
+                {
+                    for (int x = 0; x < 10; x++)
+                        FMLLog.severe("!!!!!!!!!! UPDATING WORLD WITHOUT DOING BACKUP !!!!!!!!!!!!!!!!");
+                }
             }
             catch (IOException e)
             {