diff --git a/electrum/rsakey.py b/electrum/rsakey.py
index 97efd65d0..18a0d7338 100644
--- a/electrum/rsakey.py
+++ b/electrum/rsakey.py
@@ -125,7 +125,6 @@ def numBits(n):
      '8':4, '9':4, 'a':4, 'b':4,
      'c':4, 'd':4, 'e':4, 'f':4,
      }[s[0]]
-    return int(math.floor(math.log(n, 2))+1)
 
 def numBytes(n):
     if n==0: