diff --git a/marble.spec b/marble.spec
index cfc93fe..c64aa0b 100644
--- a/marble.spec
+++ b/marble.spec
@@ -26,6 +26,7 @@ Release:        0
 # Latest stable Applications (e.g. 16.08 in KA, but 16.11.80 in KUA)
 %{!?_kapp_version: %global _kapp_version %(echo %{version}| awk -F. '{print $1"."$2}')}
 Summary:        Generic map viewer
+# License note: the tools directory contains GPL-3 tools, but they are neither built nor installed by the package
 License:        LGPL-2.1+
 Group:          Amusements/Teaching/Other
 Url:            http://edu.kde.org