diff --git a/mclevel.py b/mclevel.py
index 9dbf4e4..622b652 100644
--- a/mclevel.py
+++ b/mclevel.py
@@ -2491,7 +2491,8 @@ class MCInfdevOldLevel(MCLevel):
             
         self.filename = os.path.join(self.worldDir, "level.dat")
         self.regionDir = os.path.join(self.worldDir, "region")
-        
+        if not os.path.exists(self.regionDir):
+            os.mkdir(self.regionDir)
                 
         #maps (cx,cz) pairs to InfdevChunks    
         self._loadedChunks = {}