diff --git a/setup.py b/setup.py
index c8dd63b0a68d0f9ec715ccc26f6b37361847aa85..96c0b017d9e0b58c0ab48c0651f81b44a193e755 100755
--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,7 @@ def finalize_options(self):
     def run(self):
         self.announce('Building Qt applications...', WARN)
         make = self.find_executable('make', ('gmake', 'make'))
-        if PY3:
+        if not PY3:
             pyuic5 = self.find_executable(
                 'pyuic5',
                 ('python2-pyuic5', 'pyuic5-python2.7', 'pyuic5'))