diff --git a/setup.py b/setup.py
index 6845d3c7..83184451 100755
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,20 @@
 #!/usr/bin/env python
+import sys
 
 """Setup script for the 'uncompyle6' distribution."""
 
+SYS_VERSION = sys.version_info[0:2]
+if not ((2, 6) <= SYS_VERSION  <= (3, 7)) or ((3, 0) <= SYS_VERSION <= (3, 2)):
+    mess = "Python Release 2.6 .. 3.7 excluding 3.1 and 3.2 are supported in this code branch."
+    if ((2, 4) <= SYS_VERSION <= (2, 7)):
+        mess += ("\nFor your Python, version %s, use the python-2.4 code/branch." %
+                 sys.version[0:3])
+    elif SYS_VERSION < (2, 4) or ((3, 0) <= SYS_VERSION <= (3, 2)):
+        mess += ("\nThis package is not supported before Python 2.4. Your Python version is %s."
+                 % sys.version[0:3])
+    print(mess)
+    raise Exception(mess)
+
 from __pkginfo__ import \
     author,           author_email,       install_requires,          \
     license,          long_description,   classifiers,               \