diff --git a/man/subscription-manager.8 b/man/subscription-manager.8
index de260fe2c0..ee362054da 100644
--- a/man/subscription-manager.8
+++ b/man/subscription-manager.8
@@ -227,7 +227,7 @@ Gives a comma-separated list of product keys to apply specific subscriptions to
 .IP
 When the
 .B --activationkey
-option is used, it is not necessary to use the
+option is used, it is not possible to use the
 .B --username
 and
 .B --password