diff --git a/lib/py/src/protocol/TProtocol.py b/lib/py/src/protocol/TProtocol.py
index e8ee799..311a635 100644
--- a/lib/py/src/protocol/TProtocol.py
+++ b/lib/py/src/protocol/TProtocol.py
@@ -403,16 +403,16 @@
       writer(val)
 
 def checkIntegerLimits(i, bits):
-    if bits == 8 and (n < -128 or n > 127):
+    if bits == 8 and (i < -128 or i > 127):
         raise TProtocolException(TProtocolException.INVALID_DATA,
                                  "i8 requires -128 <= number <= 127")
-    elif bits == 16 and (n < -32768 or n > 32767):
+    elif bits == 16 and (i < -32768 or i > 32767):
         raise TProtocolException(TProtocolException.INVALID_DATA,
                                  "i16 requires -32768 <= number <= 32767")
-    elif bits == 32 and (n < -2147483648 or n > 2147483647):
+    elif bits == 32 and (i < -2147483648 or i > 2147483647):
         raise TProtocolException(TProtocolException.INVALID_DATA,
                                  "i32 requires -2147483648 <= number <= 2147483647")
-    elif bits == 64 and (n < -9223372036854775808 or n > 9223372036854775807):
+    elif bits == 64 and (i < -9223372036854775808 or i > 9223372036854775807):
          raise TProtocolException(TProtocolException.INVALID_DATA,
                                   "i64 requires -9223372036854775808 <= number <= 9223372036854775807")