diff --git a/MozillaFirefox.changes b/MozillaFirefox.changes
index 8ae7793b..213afe12 100644
--- a/MozillaFirefox.changes
+++ b/MozillaFirefox.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed May  2 20:46:37 UTC 2018 - wr@rosenauer.org
+
+- do not try CSD on kwin (boo#1091592)
+
 -------------------------------------------------------------------
 Tue May  1 18:45:02 UTC 2018 - astieger@suse.com
 
diff --git a/mozilla-enable-csd.patch b/mozilla-enable-csd.patch
index 92206284..9e5c7345 100644
--- a/mozilla-enable-csd.patch
+++ b/mozilla-enable-csd.patch
@@ -45,7 +45,7 @@ Index: mozilla/widget/gtk/nsWindow.cpp
 +        } else if (strstr(currentDesktop, "X-Cinnamon") != nullptr) {
 +            sCSDSupportLevel = CSD_SUPPORT_FULL;
 +        } else if (strstr(currentDesktop, "KDE") != nullptr) {
-+            sCSDSupportLevel = CSD_SUPPORT_FLAT;
++            sCSDSupportLevel = CSD_SUPPORT_NONE;
 +        } else if (strstr(currentDesktop, "LXDE") != nullptr) {
 +            sCSDSupportLevel = CSD_SUPPORT_FLAT;
 +        } else if (strstr(currentDesktop, "openbox") != nullptr) {