diff --git a/pkgtool.pm b/pkgtool.pm
index e4ffeb3..776da74 100644
--- a/pkgtool.pm
+++ b/pkgtool.pm
@@ -4018,7 +4018,7 @@ sub get_install_sets ($)
 				}
 			}
 			else {
-				print_log('global', ERROR, 'Undefined packaget set %s', $value);
+				print_log('global', WARNING, 'Unknown package set %s', $value);
 			}
 			next;
 		}