diff --git a/setup.py b/setup.py
index a7a1458a..76f1f7a9 100644
--- a/setup.py
+++ b/setup.py
@@ -102,7 +102,7 @@ class Clean(Command):
         if self.docs:
             paths.update(Clean.DOCS)
 
-        if self.all:
+        if self.all or not paths:
             paths.update(Clean.ALL)
 
         for path in sorted(list(paths)):