diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 65b7e8e3d4e420fd57d47a492191d9a336d920a2..0be692bd520884d54e2c69e35ef4079973dab714 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,9 @@
+2012-12-04  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* include/Makefile.am (${host_builddir}/c++config.h): Replace
+	[<space><tab>] by [<tab><space>].
+	* include/Makefile.in: Regenerate.
+
 2012-12-04  Steven Bosscher  <steven@gcc.gnu.org>
 
 	* include/Makefile.am: Fix regexp broken by previous commit.
diff --git a/libstdc++-v3/include/Makefile.am b/libstdc++-v3/include/Makefile.am
index 6760bd8ab76bff99b5f869f1342b62de87de02ab..b940a9ca9aac9ee4a27759b75c06197354f77173 100644
--- a/libstdc++-v3/include/Makefile.am
+++ b/libstdc++-v3/include/Makefile.am
@@ -1105,7 +1105,7 @@ ${host_builddir}/c++config.h: ${CONFIG_HEADER} \
 	visibility=`cat stamp-visibility` ;\
 	externtemplate=`cat stamp-extern-template` ;\
 	ldbl_compat='s,g,g,' ;\
-	grep "^[ 	]*#[ 	]*define[ 	][ 	]*_GLIBCXX_LONG_DOUBLE_COMPAT[ 	][ 	]*1[ 	]*$$" \
+	grep "^[	 ]*#[	 ]*define[	 ][	 ]*_GLIBCXX_LONG_DOUBLE_COMPAT[	 ][	 ]*1[	 ]*$$" \
 	${CONFIG_HEADER} > /dev/null 2>&1 \
 	&& ldbl_compat='s,^#undef _GLIBCXX_LONG_DOUBLE_COMPAT$$,#define _GLIBCXX_LONG_DOUBLE_COMPAT 1,' ;\
 	sed -e "s,define __GLIBCXX__,define __GLIBCXX__ $$date," \
@@ -1119,7 +1119,7 @@ ${host_builddir}/c++config.h: ${CONFIG_HEADER} \
 	    -e 's/VERSION/_GLIBCXX_VERSION/g' \
 	    -e 's/WORDS_/_GLIBCXX_WORDS_/g' \
 	    -e 's/ICONV_CONST/_GLIBCXX_ICONV_CONST/g' \
-	    -e '/[ 	]_GLIBCXX_LONG_DOUBLE_COMPAT[ 	]/d' \
+	    -e '/[	 ]_GLIBCXX_LONG_DOUBLE_COMPAT[	 ]/d' \
 	    < ${CONFIG_HEADER} >> $@ ;\
 	echo "" >> $@ ;\
 	echo "#endif // _GLIBCXX_CXX_CONFIG_H" >> $@
diff --git a/libstdc++-v3/include/Makefile.in b/libstdc++-v3/include/Makefile.in
index 7fd84874277eaae3df2254a0de718aa3c869dbab..4b0687244e52bf3f7d434a594819d8271f28736a 100644
--- a/libstdc++-v3/include/Makefile.in
+++ b/libstdc++-v3/include/Makefile.in
@@ -1507,7 +1507,7 @@ ${host_builddir}/c++config.h: ${CONFIG_HEADER} \
 	visibility=`cat stamp-visibility` ;\
 	externtemplate=`cat stamp-extern-template` ;\
 	ldbl_compat='s,g,g,' ;\
-	grep "^[ 	]*#[ 	]*define[ 	][ 	]*_GLIBCXX_LONG_DOUBLE_COMPAT[ 	][ 	]*1[ 	]*$$" \
+	grep "^[	 ]*#[	 ]*define[	 ][	 ]*_GLIBCXX_LONG_DOUBLE_COMPAT[	 ][	 ]*1[	 ]*$$" \
 	${CONFIG_HEADER} > /dev/null 2>&1 \
 	&& ldbl_compat='s,^#undef _GLIBCXX_LONG_DOUBLE_COMPAT$$,#define _GLIBCXX_LONG_DOUBLE_COMPAT 1,' ;\
 	sed -e "s,define __GLIBCXX__,define __GLIBCXX__ $$date," \
@@ -1521,7 +1521,7 @@ ${host_builddir}/c++config.h: ${CONFIG_HEADER} \
 	    -e 's/VERSION/_GLIBCXX_VERSION/g' \
 	    -e 's/WORDS_/_GLIBCXX_WORDS_/g' \
 	    -e 's/ICONV_CONST/_GLIBCXX_ICONV_CONST/g' \
-	    -e '/[ 	]_GLIBCXX_LONG_DOUBLE_COMPAT[ 	]/d' \
+	    -e '/[	 ]_GLIBCXX_LONG_DOUBLE_COMPAT[	 ]/d' \
 	    < ${CONFIG_HEADER} >> $@ ;\
 	echo "" >> $@ ;\
 	echo "#endif // _GLIBCXX_CXX_CONFIG_H" >> $@