diff --git a/srcpkgs/musl-bootstrap/template b/srcpkgs/musl-bootstrap/template
index 25b6066862b..d65452bd668 100644
--- a/srcpkgs/musl-bootstrap/template
+++ b/srcpkgs/musl-bootstrap/template
@@ -13,7 +13,7 @@ homepage="http://www.musl-libc.org/"
 distfiles="http://www.musl-libc.org/releases/musl-${version}.tar.gz"
 checksum=5a0160c55c540d5b90158617a57647f1b03209f58d9ee70dbce19d1115b4f1b4
 
-CFLAGS="-fno-toplevel-reorder -fno-stack-protector"
+CFLAGS="-fno-toplevel-reorder -fno-stack-protector -U_FORTIFY_SOURCE"
 
 post_install() {
 	mv ${DESTDIR}/lib/* ${DESTDIR}/usr/lib/
diff --git a/srcpkgs/musl/template b/srcpkgs/musl/template
index 1288a4e996f..0f1fb7378eb 100644
--- a/srcpkgs/musl/template
+++ b/srcpkgs/musl/template
@@ -14,7 +14,7 @@ checksum=5a0160c55c540d5b90158617a57647f1b03209f58d9ee70dbce19d1115b4f1b4
 
 shlib_provides="libc.so"
 only_for_archs="i686-musl x86_64-musl armv6l-musl armv7l-musl"
-CFLAGS="-fno-stack-protector"
+CFLAGS="-fno-stack-protector -U_FORTIFY_SOURCE"
 
 post_build() {
 	$CC $CFLAGS $LDFLAGS ${FILESDIR}/getent.c -o getent