diff --git a/mingw-w64-sip/003-template-error.patch b/mingw-w64-sip/003-template-error.patch
deleted file mode 100644
index 7b1ac5f45e..0000000000
--- a/mingw-w64-sip/003-template-error.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/sipbuild/generator/instantiations.py b/sipbuild/generator/instantiations.py
-index b351a29b..de38c0cf 100644
---- a/sipbuild/generator/instantiations.py
-+++ b/sipbuild/generator/instantiations.py
-@@ -461,7 +461,7 @@ def _superclass_from_class(klass, p, symbol, tmpl_names, template, pm):
-     # Only deal with undefined classes with unscoped names which is how
-     # template argument names are passed.
-     if klass.iface_file.module is None and superclass_name.is_simple:
--        superclass = _find_argument_value(superclass_name, p, symbol,
-+        superclass = _find_argument_value(superclass_name.base_name, p, symbol,
-                 tmpl_names, template, pm)
- 
-         if superclass is None:
diff --git a/mingw-w64-sip/PKGBUILD b/mingw-w64-sip/PKGBUILD
index a0c99b66ed..a548b6ebad 100644
--- a/mingw-w64-sip/PKGBUILD
+++ b/mingw-w64-sip/PKGBUILD
@@ -5,8 +5,8 @@
 _realname=sip
 pkgbase=mingw-w64-${_realname}
 pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}")
-pkgver=6.11.1
-pkgrel=2
+pkgver=6.12.0
+pkgrel=1
 pkgdesc="A tool that makes it easy to create Python bindings for C and C++ libraries (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -26,12 +26,10 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-python-build"
 options=(!strip)
 source=(https://pypi.python.org/packages/source/s/sip/sip-${pkgver}.tar.gz
         001-mingw-python.patch
-        002-wrappers.patch
-        003-template-error.patch)
-sha256sums=('3dae4baaf9e9f781d84bf293e0e2938dc7f44b826837889026eba53bd36c81b5'
+        002-wrappers.patch)
+sha256sums=('083ced94f85315493231119a63970b2ba42b1d38b38e730a70e02a99191a89c6'
             '15d64d0ff5253096a3fb5d3d4584eab8f93b9e9ffbcfee1c02dce00d695e6027'
-            'ba695df87296ad5be7a64d57ce0a8f54db3867a9b69b303b76482f2ac48bb7d6'
-            'e6cf27433d9a742a3164aeabee26a158675d1c10109439acaf58ff06a09cd10e')
+            'ba695df87296ad5be7a64d57ce0a8f54db3867a9b69b303b76482f2ac48bb7d6')
 
 apply_patch_with_msg() {
   for _patch in "$@"
@@ -49,10 +47,6 @@ prepare() {
     001-mingw-python.patch \
     002-wrappers.patch
 
-  # https://github.com/Python-SIP/sip/issues/77#issuecomment-2909587858
-  apply_patch_with_msg \
-    003-template-error.patch
-
   cd "${srcdir}"
   rm -rf python-build-${MSYSTEM} | true
   cp -r "${_realname}-${pkgver}" "python-build-${MSYSTEM}"