--- rpl/configure.ac	2017/08/21 09:06:02	1.201
+++ rpl/configure.ac	2017/08/21 09:11:23	1.202
@@ -443,6 +443,12 @@ if test "$UUENCODE" = no; then
 	AC_MSG_ERROR([Can not find uuencode !])
 fi
 
+dnl Checks for patch
+AC_CHECK_PROG(PATCH, patch, yes, no)
+if test "$PATCH" = no; then
+	AC_MSG_ERROR([Can not find patch !])
+fi
+
 if test ! -d tools; then
 	mkdir tools
 fi