diff --git a/acinclude.m4 b/acinclude.m4
index 59133e35db7..408a46d38ab 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2067,11 +2067,11 @@ AC_DEFUN([PHP_PROG_RE2C],[
   AC_CHECK_PROG(RE2C, re2c, re2c)
   if test -n "$RE2C"; then
     AC_CACHE_CHECK([for re2c version], php_cv_re2c_version, [
-      re2c_vernum=`echo "" | re2c --vernum 2>/dev/null`
-      if test -z "$re2c_vernum" || test "$re2c_vernum" -lt "911"; then
+      re2c_vernum=`re2c --vernum 2>/dev/null`
+      if test -z "$re2c_vernum" || test "$re2c_vernum" -lt "1200"; then
         php_cv_re2c_version=invalid
       else
-        php_cv_re2c_version="`echo "" | re2c --version | cut -d ' ' -f 2  2>/dev/null` (ok)"
+        php_cv_re2c_version="`re2c --version | cut -d ' ' -f 2  2>/dev/null` (ok)"
       fi 
     ])
   fi