diff --git a/build/php.m4 b/build/php.m4
index 9287d2fc60c..78fbe14c8f8 100644
--- a/build/php.m4
+++ b/build/php.m4
@@ -1870,7 +1870,7 @@ AC_DEFUN([PHP_PROG_RE2C],[
     if test "$php_re2c_check" != "invalid"; then
       AC_MSG_RESULT([$php_re2c_version (ok)])
     else
-      AC_MSG_RESULT([$php_re2c_version])
+      AC_MSG_RESULT([$php_re2c_version (too old)])
     fi
   fi
 
diff --git a/configure.ac b/configure.ac
index cd77a89ff20..ff69c06adc6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -164,7 +164,7 @@ PHP_RUNPATH_SWITCH
 dnl Checks for some support/generator progs.
 PHP_PROG_AWK
 PHP_PROG_BISON([3.0.0])
-PHP_PROG_RE2C([0.13.4])
+PHP_PROG_RE2C([1.0.3])
 PHP_PROG_PHP()
 
 PHP_ARG_ENABLE([re2c-cgoto],