diff --git a/srcpkgs/flatbuffers/template b/srcpkgs/flatbuffers/template
index 2888235df1a..d38db2c5b08 100644
--- a/srcpkgs/flatbuffers/template
+++ b/srcpkgs/flatbuffers/template
@@ -10,6 +10,9 @@ homepage="https://google.github.io/flatbuffers/"
 distfiles="https://github.com/google/${pkgname}/archive/v${version}.tar.gz"
 checksum=3714e3db8c51e43028e10ad7adffb9a36fc4aa5b1a363c2d0c4303dd1be59a7c
 
+# prevents building of tests on gcc9
+CXXFLAGS="-Wno-error=class-memaccess"
+
 if [ "$CROSS_BUILD" ]; then
 	# Disable tests to prevent executing target binaries on host
 	configure_args="-DFLATBUFFERS_BUILD_TESTS=OFF"