diff --git a/scripts/generic-package-manager.py b/scripts/generic-package-manager.py
index 77f6878..c17038c 100644
--- a/scripts/generic-package-manager.py
+++ b/scripts/generic-package-manager.py
@@ -23,7 +23,7 @@ def validate_args(missing_a_example, missing_b_example):
     if not arg_a:
          print (missing_a_example)
          exit
-    if not missing_b_example and not arg_b:
+    if missing_b_example and not arg_b:
          print (missing_b_example)
          exit