diff --git a/autoconf-2.62-449245.patch b/autoconf-2.62-449245.patch
new file mode 100644
index 0000000..bbb3cf2
--- /dev/null
+++ b/autoconf-2.62-449245.patch
@@ -0,0 +1,75 @@
+diff -urN autoconf-2.62/ChangeLog autoconf-2.62_new/ChangeLog
+--- autoconf-2.62/ChangeLog	2008-06-24 15:18:34.000000000 +0200
++++ autoconf-2.62_new/ChangeLog	2008-06-24 15:24:35.000000000 +0200
+@@ -1,3 +1,14 @@
++2008-06-16  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
++
++	Fix '#undef variable /* comment */' transform in config headers.
++	* lib/autoconf/status.m4 (_AC_OUTPUT_HEADERS_PREPARE): For
++	undefined preprocessor macros that are followed by a comment
++	in the header template, do not create nested comments in the
++	output.
++	* tests/torture.at (@%:@define header templates): Extend test.
++	* NEWS: Update.
++	Report by Karsten Hopp <karsten@redhat.com>.
++
+ 2008-06-05  Eric Blake  <ebb9@byu.net>
+ 
+ 	Fix regression in AT_KEYWORDS([Macro]), from 2007-10-18.
+diff -urN autoconf-2.62/lib/autoconf/status.m4 autoconf-2.62_new/lib/autoconf/status.m4
+--- autoconf-2.62/lib/autoconf/status.m4	2008-04-06 01:04:48.000000000 +0200
++++ autoconf-2.62_new/lib/autoconf/status.m4	2008-06-24 15:21:54.000000000 +0200
+@@ -832,9 +832,9 @@
+   }
+   split(mac1, mac2, "(") #)
+   macro = mac2[1]
++  prefix = substr(line, 1, index(line, defundef) - 1)
+   if (D_is_set[macro]) {
+     # Preserve the white space surrounding the "#".
+-    prefix = substr(line, 1, index(line, defundef) - 1)
+     print prefix "define", macro P[macro] D[macro]
+     next
+   } else {
+@@ -842,7 +842,7 @@
+     # in the case of _POSIX_SOURCE, which is predefined and required
+     # on some systems where configure will not decide to define it.
+     if (defundef == "undef") {
+-      print "/*", line, "*/"
++      print "/*", prefix defundef, macro, "*/"
+       next
+     }
+   }
+diff -urN autoconf-2.62/NEWS autoconf-2.62_new/NEWS
+--- autoconf-2.62/NEWS	2008-06-24 15:18:34.000000000 +0200
++++ autoconf-2.62_new/NEWS	2008-06-24 15:25:28.000000000 +0200
+@@ -25,6 +25,9 @@
+    like '__restrict' if the variant spelling is available, as this is
+    more likely to work when mixing C and C++ code.
+ 
++** Config header templates `#undef UNDEFINED /* comment */' do not lead to
++   nested comments any more; regression introduced in 2.62.
++
+ ** AC_CHECK_ALIGNOF's type argument T is now documented better: it must
+    be a string of tokens such that "T y;" is a valid member declaration
+    in a struct.
+diff -urN autoconf-2.62/tests/torture.at autoconf-2.62_new/tests/torture.at
+--- autoconf-2.62/tests/torture.at	2008-04-06 01:04:48.000000000 +0200
++++ autoconf-2.62_new/tests/torture.at	2008-06-24 15:23:21.000000000 +0200
+@@ -497,6 +497,8 @@
+ #define str(define) \
+ #define
+ #define stringify(arg) str(arg)
++#undef aaa /* with comments */
++#undef not_substed /* with comments */
+ ]])
+ 
+ AT_CHECK_AUTOCONF
+@@ -527,6 +529,8 @@
+ #define str(define) \
+ #define
+ #define stringify(arg) str(arg)
++#define aaa AAA
++/* #undef not_substed */
+ ]])
+ AT_CHECK([cat config.h], 0, expout)
+ 
diff --git a/autoconf.spec b/autoconf.spec
index 9080c57..6b18da0 100644
--- a/autoconf.spec
+++ b/autoconf.spec
@@ -1,7 +1,7 @@
 Summary:    A GNU tool for automatically configuring source code
 Name:       autoconf
 Version:    2.62
-Release:    2%{?dist}
+Release:    3%{?dist}
 License:    GPLv2+ and GFDL
 Group:      Development/Tools
 Source:     http://ftp.gnu.org/gnu/autoconf/autoconf-%{version}.tar.bz2
@@ -9,6 +9,7 @@ Source1:    filter-provides-automake.sh
 Source2:    filter-requires-automake.sh
 # This one will be included in 2.63:
 Patch0:     autoconf-2.62-449973.patch
+Patch1:     autoconf-2.62-449245.patch
 URL:        http://www.gnu.org/software/autoconf/
 BuildRequires:      m4 >= 1.4.7, emacs
 Requires:           m4 >= 1.4.7, mktemp, imake, grep
@@ -41,6 +42,7 @@ their use.
 %prep
 %setup -q
 %patch0 -p1
+%patch1 -p1
 
 %build
 # use ./configure here to avoid copying config.{sub,guess} with those from the
@@ -82,6 +84,9 @@ fi
 %doc AUTHORS COPYING ChangeLog NEWS README THANKS TODO
 
 %changelog
+* Tue Jun 24 2008 Karsten Hopp <karsten@redhat.com> 2.62-3
+- add fix for same line comments #449245 (Ralf Wildenhues)
+
 * Fri Jun 06 2008 Karsten Hopp <karsten@redhat.com> 2.62-2
 - add upstream fix from Eric Blake for #449973, 
   m4_if releated error message from autotest