diff --git a/slpkg/main.py b/slpkg/main.py
index 4196c2ea..c2dbacd2 100644
--- a/slpkg/main.py
+++ b/slpkg/main.py
@@ -146,7 +146,7 @@ class ArgParse(BlackList):
             repos = self.args[1].split("=")[-1].split(",")
             for rp in repos:
                 if rp not in self.meta.repositories:
-                    repos.remove(rp)
+                    usage(rp, 1)
             upgrade.run(repos)
         else:
             usage("", 1)