diff --git a/bindings/python/cmake/setup.py.in b/bindings/python/cmake/setup.py.in
index 6340c5a..115b6f2 100644
--- a/bindings/python/cmake/setup.py.in
+++ b/bindings/python/cmake/setup.py.in
@@ -11,7 +11,7 @@
 from distutils.core import setup
 import sys
 
-if (not sys.version_info[0] is 3):
+if ( sys.version_info[0] != 3):
     sys.exit('libmsym module requires python 3')
     
 setup(name='libmsym',
diff --git a/bindings/python/setup.py b/bindings/python/setup.py
index 2a15e8d..908d767 100644
--- a/bindings/python/setup.py
+++ b/bindings/python/setup.py
@@ -11,7 +11,7 @@
 from distutils.core import setup
 import sys
 
-if (not sys.version_info[0] is 3):
+if ( sys.version_info[0] != 3):
     sys.exit('libmsym module requires python 3')
     
 setup(name='libmsym',