diff --git a/extra/qt5-base/PKGBUILD b/extra/qt5-base/PKGBUILD
index 6ce73eeea..a799c0eb8 100644
--- a/extra/qt5-base/PKGBUILD
+++ b/extra/qt5-base/PKGBUILD
@@ -10,7 +10,7 @@ pkgbase=qt5-base
 pkgname=(qt5-base qt5-xcb-private-headers)
 _qtver=5.15.0
 pkgver=${_qtver/-/}
-pkgrel=2
+pkgrel=3
 arch=('x86_64')
 url='https://www.qt.io'
 license=('GPL3' 'LGPL3' 'FDL' 'custom')
@@ -36,17 +36,20 @@ _pkgfqn="${pkgbase/5-/}-everywhere-src-${_qtver}"
 source=("https://download.qt.io/official_releases/qt/${pkgver%.*}/${_qtver}/submodules/${_pkgfqn}.tar.xz"
         "qt5-base-QTBUG-82910.patch::https://codereview.qt-project.org/gitweb?p=qt/qtbase.git;a=patch;h=54aa63be9b74e8de72db9efbe6809ab1a97b29a7"
          qt5-base-cflags.patch
-         qtbug-74252.patch)
+         qtbug-74252.patch
+         qtbug-78966.patch::"https://code.qt.io/cgit/qt/qtbase.git/patch/?id=777f2a1c")
 sha256sums=('9e7af10aece15fa9500369efde69cb220eee8ec3a6818afe01ce1e7d484824c5'
             'abb94453c9fe54fde4811bc5475b88796c8db1f5cd75ddc68918aff20139b1aa'
             'cf707cd970650f8b60f8897692b36708ded9ba116723ec8fcd885576783fe85c'
-            '0c489d2faedd35670232a2c028c5c78a606ab81bb6f40f58e3cfe2bc6b6ac3b2')
+            '0c489d2faedd35670232a2c028c5c78a606ab81bb6f40f58e3cfe2bc6b6ac3b2'
+            'd7d58b2cadd6e79c3dfb69da664ecac9c95a78d6e142cb8687fce68e24a10776')
 
 prepare() {
   cd ${_pkgfqn}
 
   patch -p1 -i ../qt5-base-QTBUG-82910.patch # https://codereview.qt-project.org/c/qt/qtbase/+/299182
   patch -p1 -i ../qtbug-74252.patch # Fix displaying custom icons
+  patch -p1 -i ../qtbug-78966.patch # Fix QToolButton menus on multi-screen systems
   patch -p1 -i ../qt5-base-cflags.patch # Use system CFLAGS
 }