diff --git a/kde-apps/thumbnailers/thumbnailers-16.08.3.ebuild b/kde-apps/thumbnailers/thumbnailers-16.08.3.ebuild
index 8908ccbe59109..dbb4c9195ecbe 100644
--- a/kde-apps/thumbnailers/thumbnailers-16.08.3.ebuild
+++ b/kde-apps/thumbnailers/thumbnailers-16.08.3.ebuild
@@ -1,9 +1,10 @@
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2017 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Id$
 
 EAPI=6
 
+KDE_BLOCK_SLOT4="false"
 KMNAME="kdegraphics-thumbnailers"
 inherit kde5
 
diff --git a/kde-apps/thumbnailers/thumbnailers-16.12.1.ebuild b/kde-apps/thumbnailers/thumbnailers-16.12.1.ebuild
index ab0f9b86272e6..785cf0b43fff5 100644
--- a/kde-apps/thumbnailers/thumbnailers-16.12.1.ebuild
+++ b/kde-apps/thumbnailers/thumbnailers-16.12.1.ebuild
@@ -4,6 +4,7 @@
 
 EAPI=6
 
+KDE_BLOCK_SLOT4="false"
 KMNAME="kdegraphics-thumbnailers"
 inherit kde5