diff --git a/srcpkgs/libmp4v2/template b/srcpkgs/libmp4v2/template
index 3b1c4398cac..674b6ee304a 100644
--- a/srcpkgs/libmp4v2/template
+++ b/srcpkgs/libmp4v2/template
@@ -12,6 +12,8 @@ license="MPL-1.1"
 distfiles="https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/mp4v2/${wrksrc}.tar.bz2"
 checksum=0319b9a60b667cf10ee0ec7505eb7bdc0a2e21ca7a93db96ec5bd758e3428338
 
+CXXFLAGS="-Wno-narrowing"
+
 libmp4v2-devel_package() {
 	depends="libmp4v2>=${version}_${revision}"
 	short_desc+=" - development files"