diff --git a/srcpkgs/rcs/template b/srcpkgs/rcs/template
index 324a9875fe4..e04f48ff9c1 100644
--- a/srcpkgs/rcs/template
+++ b/srcpkgs/rcs/template
@@ -1,7 +1,7 @@
 # Template file for 'rcs'
 pkgname=rcs
-version=5.9.4
-revision=4
+version=5.10.0
+revision=1
 build_style=gnu-configure
 hostmakedepends="ed groff"
 makedepends="ed"
@@ -11,5 +11,4 @@ maintainer="Leah Neukirchen <leah@vuxu.org>"
 license="GPL-3.0-or-later"
 homepage="http://www.gnu.org/software/rcs/"
 distfiles="${GNU_SITE}/${pkgname}/${pkgname}-${version}.tar.xz"
-checksum=063d5a0d7da1821754b80c639cdae2c82b535c8ff4131f75dc7bbf0cd63a5dff
-CFLAGS="-std=c99"
+checksum=3a0d9f958c7ad303e475e8634654974edbe6deb3a454491f3857dc1889bac5c5