diff --git a/setup.py b/setup.py
index 57a40a9677..71c95cbdef 100644
--- a/setup.py
+++ b/setup.py
@@ -72,7 +72,8 @@
 URL = "https://github.com/ARM-DOE/pyart"
 DOWNLOAD_URL = "https://github.com/ARM-DOE/pyart"
 LICENSE = 'BSD'
-PLATFORMS = "Linux, Mac OS-X, Unix, Windows"
+CLASSIFIERS = list(filter(None, CLASSIFIERS.split("\n")))
+PLATFORMS = ["Linux", "Mac OS-X", "Unix", "Windows"]
 SCRIPTS = glob.glob('scripts/*')