diff --git a/x11-libs/libva-intel-media-driver/libva-intel-media-driver-18.4.1.ebuild b/x11-libs/libva-intel-media-driver/libva-intel-media-driver-18.4.1.ebuild
index e08e05733d2..d4592edaf68 100644
--- a/x11-libs/libva-intel-media-driver/libva-intel-media-driver-18.4.1.ebuild
+++ b/x11-libs/libva-intel-media-driver/libva-intel-media-driver-18.4.1.ebuild
@@ -35,8 +35,12 @@ DEPEND=">=media-libs/gmmlib-${PV}
 RDEPEND="${DEPEND}"
 
 src_configure() {
+	sed -i -e '/^\s*-Werror=implicit-function-declaration\s*$/d' \
+		media_driver/cmake/linux/media_compile_flags_linux.cmake
+
 	local mycmakeargs=(
 		-DMEDIA_RUN_TEST_SUITE=OFF
+		-DMEDIA_BUILD_FATAL_WARNINGS=OFF
 	)
 
 	cmake-utils_src_configure