diff --git a/third_party/tlslite/tlslite/tlsrecordlayer.py b/third_party/tlslite/tlslite/tlsrecordlayer.py
index ff08cbf..8b92221 100644
--- a/third_party/tlslite/tlslite/tlsrecordlayer.py
+++ b/third_party/tlslite/tlslite/tlsrecordlayer.py
@@ -586,10 +586,10 @@ class TLSRecordLayer(object):
                 if self.version == (3,2):
                     b = self.fixedIVBlock + b
 
-                #Add padding: b = b+ (macBytes + paddingBytes)
-                currentLength = len(b) + len(macBytes) + 1
+                #Add padding: b = b + (macBytes + paddingBytes)
+                currentLength = len(b) + len(macBytes)
                 blockLength = self._writeState.encContext.block_size
-                paddingLength = blockLength-(currentLength % blockLength)
+                paddingLength = blockLength - 1 - (currentLength % blockLength)
 
                 paddingBytes = bytearray([paddingLength] * (paddingLength+1))
                 if self.fault == Fault.badPadding: