diff --git a/dev-libs/injeqt/files/injeqt-1.2.0-no-Werror.patch b/dev-libs/injeqt/files/injeqt-1.2.0-no-Werror.patch
new file mode 100644
index 0000000000000..ffb8aae9b1b7c
--- /dev/null
+++ b/dev-libs/injeqt/files/injeqt-1.2.0-no-Werror.patch
@@ -0,0 +1,12 @@
+diff -ruN injeqt-1.2.0/CMakeLists.txt injeqt-my/CMakeLists.txt
+--- injeqt-1.2.0/CMakeLists.txt	2017-04-21 11:40:08.000000000 +0200
++++ injeqt-my/CMakeLists.txt	2020-10-14 02:04:12.645803149 +0200
+@@ -37,7 +37,7 @@
+ 	cmake_policy (SET CMP0043 NEW)
+ endif ()
+ 
+-set (WARNINGS "-Werror -W -Wall -Wextra -Wundef -Wunused -Wuninitialized -Wcast-align -Wpointer-arith -Woverloaded-virtual -Wnon-virtual-dtor -fno-common")
++set (WARNINGS "-W -Wall -Wextra -Wundef -Wunused -Wuninitialized -Wcast-align -Wpointer-arith -Woverloaded-virtual -Wnon-virtual-dtor -fno-common")
+ set (VISIBILITY "-fvisibility=hidden -fvisibility-inlines-hidden")
+ set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 ${WARNINGS} ${VISIBILITY}")
+ 
diff --git a/dev-libs/injeqt/injeqt-1.2.0.ebuild b/dev-libs/injeqt/injeqt-1.2.0.ebuild
index 3d9de6be309d7..42410678e47c7 100644
--- a/dev-libs/injeqt/injeqt-1.2.0.ebuild
+++ b/dev-libs/injeqt/injeqt-1.2.0.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -24,7 +24,10 @@ DEPEND="${RDEPEND}
 # https://github.com/vogel/injeqt/issues/18
 RESTRICT=test
 
-PATCHES=( "${FILESDIR}/${P}-gcc7.patch" )
+PATCHES=(
+	"${FILESDIR}/${P}-gcc7.patch"
+	"${FILESDIR}/${PN}-1.2.0-no-Werror.patch"
+)
 
 src_configure() {
 	local mycmakeargs=(