diff --git a/srcpkgs/dosfstools/template b/srcpkgs/dosfstools/template
index cefa6d47904..102979455c3 100644
--- a/srcpkgs/dosfstools/template
+++ b/srcpkgs/dosfstools/template
@@ -12,6 +12,8 @@ license="GPL-2"
 distfiles="https://github.com/$pkgname/$pkgname/releases/download/v$version/$pkgname-$version.tar.xz"
 checksum=ee95913044ecf2719b63ea11212917649709a6e53209a72d622135aaa8517ee2
 
+CFLAGS="-D_GNU_SOURCE -Du_int32_t=uint32_t"
+
 post_install() {
 	rm -rf ${DESTDIR}/usr/share/doc
 }