diff --git a/src/levelscreen.py b/src/levelscreen.py
index 6f3ab32..212e414 100644
--- a/src/levelscreen.py
+++ b/src/levelscreen.py
@@ -262,7 +262,7 @@ def update(self, time):
       subLevelNumber = int(self._levelName[-1:])
       if subLevelNumber == 4:
         newLevelName = "%s%d" % (self._levelName[:5],
-          int(self._levelName[-3:]) + 100)
+          int(self._levelName[-3])*100 + 100)
       else:
         newLevelName = "%s%d" % (self._levelName[:7], subLevelNumber + 1)