diff --git a/packages/rcs/build.sh b/packages/rcs/build.sh
index 32140a2e1..3d37210eb 100644
--- a/packages/rcs/build.sh
+++ b/packages/rcs/build.sh
@@ -1,6 +1,10 @@
 TERMUX_PKG_HOMEPAGE=http://www.gnu.org/s/rcs
 TERMUX_PKG_DESCRIPTION="comp"
 TERMUX_PKG_VERSION=5.9.4
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL=http://gnu.uberglobalmirror.com/rcs/rcs-$TERMUX_PKG_VERSION.tar.xz
 TERMUX_PKG_BUILD_IN_SRC=yes
 TERMUX_PKG_SHA256=063d5a0d7da1821754b80c639cdae2c82b535c8ff4131f75dc7bbf0cd63a5dff
+TERMUX_PKG_DEPENDS="diffutils"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="ac_cv_path_DIFF=$TERMUX_PREFIX/bin/diff \
+ac_cv_path_DIFF3=$TERMUX_PREFIX/bin/diff3"