diff --git a/setup.py b/setup.py
index 6f06ad10..f155119d 100644
--- a/setup.py
+++ b/setup.py
@@ -387,10 +387,10 @@ or with the pg_config option in 'setup.cfg'.
               )
             # Support unicode paths, if this version of Python provides the
             # necessary infrastructure:
-            if hasattr(sys, 'getfilesystemencoding'):
+            if sys.version_info[0] < 3 \
+            and hasattr(sys, 'getfilesystemencoding'):
                 pg_config_path = pg_config_path.encode(
-                    sys.getfilesystemencoding()
-                  )
+                    sys.getfilesystemencoding())
 
         return pg_config_path