1 files changed, 4 insertions, 0 deletions
diff --git a/mgaapplet-upgrade-helper b/mgaapplet-upgrade-helper
index fb2a1ec0..d0ed79f4 100755
--- a/mgaapplet-upgrade-helper
+++ b/mgaapplet-upgrade-helper
@@ -20,6 +20,10 @@
 # along with this program; if not,  see <http://www.gnu.org/licenses/>.        #
 ################################################################################
 
+# Force use of default GTK theme to avoid display problems if the current
+# theme gets removed during the upgrade (mga#21425).
+BEGIN { $ENV{GTK_THEME} = 'Adwaita' }
+
 use strict;
 use POSIX ":sys_wait_h";
 use lib qw(/usr/lib/libDrakX);