diff --git a/arch/tde-core/tde-tqt3/PKGBUILD b/arch/tde-core/tde-tqt3/PKGBUILD
index 36583a4eb..0f56bd687 100644
--- a/arch/tde-core/tde-tqt3/PKGBUILD
+++ b/arch/tde-core/tde-tqt3/PKGBUILD
@@ -21,9 +21,12 @@ makedepends=('libcups'
         'unixodbc'
         'libmng'
         'xorg-xrandr'
-        'libxft')
-source=("https://mirror.ppa.trinitydesktop.org/trinity/releases/R${pkgver}/main/dependencies/tqt3-trinity-${pkgver}.tar.xz")
-md5sums=('47d8495fcf444c5db2cf56843be3f746')
+        'libxft'
+        'glu')
+source=("https://mirror.ppa.trinitydesktop.org/trinity/releases/R${pkgver}/main/dependencies/tqt3-trinity-${pkgver}.tar.xz"
+        'bp000-fix-build-key.diff')
+md5sums=('47d8495fcf444c5db2cf56843be3f746'
+         '950e3885135fd9844de856c770f19767')
 
 _prefix="/opt/trinity/tqt3"
 
@@ -31,6 +34,8 @@ build() {
 
   cd ${srcdir}/tqt3-trinity-${pkgver}
 
+  patch -p1 < ${srcdir}/bp000-fix-build-key.diff
+
   # These are probably arch-specific. They were present in old qt3
   # PKGBULD, they were present in kdemod3 PKGBUILD, they are present
   # here.
diff --git a/arch/tde-core/tde-tqt3/bp000-fix-build-key.diff b/arch/tde-core/tde-tqt3/bp000-fix-build-key.diff
new file mode 100644
index 000000000..a0a0aa42e
--- /dev/null
+++ b/arch/tde-core/tde-tqt3/bp000-fix-build-key.diff
@@ -0,0 +1,21 @@
+commit 0d60417c83fd2bd8b6fccb6dd7171b113296860a
+Author: Slávek Banko <slavek.banko@axis.cz>
+Date:   Wed Sep 22 15:00:08 2021 +0200
+
+    Fix buildkey for GCC >= 7 if the version is listed including minor numbers.
+    
+    Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
+
+diff --git a/configure b/configure
+index 92cec273..f021f563 100755
+--- a/configure
++++ b/configure
+@@ -2828,7 +2828,7 @@ g++*)
+     3.*)
+ 	COMPILER_VERSION="3.*"
+ 	;;
+-    [1-9][0-9]|[7-9]|[4-6].*)
++    [1-9][0-9]|[1-9][0-9].*|[7-9]|[4-9].*)
+ 	COMPILER_VERSION="4.*"
+ 	;;
+     *)