diff --git a/kde-apps/marble/marble-18.12.2.ebuild b/kde-apps/marble/marble-18.12.2.ebuild
index 42758843a9655..2b79d10aad21d 100644
--- a/kde-apps/marble/marble-18.12.2.ebuild
+++ b/kde-apps/marble/marble-18.12.2.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=7
 
-KDE_HANDBOOK="forceoptional"
+KDE_HANDBOOK="optional" # see src/apps/marble-kde/CMakeLists.txt
 KDE_SUBSLOT="true"
 KDE_TEST="forceoptional"
 VIRTUALX_REQUIRED="test"