diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 4d4b2c46668..2e6e52fa74a 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,11 @@
+2017-03-15  Jonathan Wakely  <jwakely@redhat.com>
+
+	* acinclude.m4 (GLIBCXX_CHECK_S_ISREG_OR_S_IFREG): Fix typo in
+	comment.
+	* config.h.in: Regenerate.
+	* configure: Regenerate.
+	* doc/Makefile.in: Regenerate.
+
 2017-03-14  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/79162
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 5998fe6fdee..8cb525b2938 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -397,7 +397,7 @@ AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
   res=no
   if test $glibcxx_cv_S_ISREG = yes; then
     AC_DEFINE(HAVE_S_ISREG, 1,
-	      [Define if S_IFREG is available in <sys/stat.h>.])
+	      [Define if S_ISREG is available in <sys/stat.h>.])
     res=S_ISREG
   elif test $glibcxx_cv_S_IFREG = yes; then
     AC_DEFINE(HAVE_S_IFREG, 1,
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 51b770dd1dd..f1527d9938b 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -454,7 +454,7 @@
 /* Define if S_IFREG is available in <sys/stat.h>. */
 #undef HAVE_S_IFREG
 
-/* Define if S_IFREG is available in <sys/stat.h>. */
+/* Define if S_ISREG is available in <sys/stat.h>. */
 #undef HAVE_S_ISREG
 
 /* Define to 1 if you have the `tanf' function. */
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 29456c4421e..2406cb9d946 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -18391,7 +18391,7 @@ else
           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
-#include <math.h>
+             #include <math.h>
              #undef isnan
              namespace std {
                using ::isnan;
diff --git a/libstdc++-v3/doc/Makefile.in b/libstdc++-v3/doc/Makefile.in
index 281394debd0..be212b4ca62 100644
--- a/libstdc++-v3/doc/Makefile.in
+++ b/libstdc++-v3/doc/Makefile.in
@@ -539,7 +539,6 @@ xml_image_generated = \
 	${xml_image_dir}/pbds_tree_text_lor_find.png
 
 xml_images = ${xml_image_basic} ${xml_image_generated}
-
 xml_noinst = \
 	${xml_dir}/book.txml \
 	${xml_dir}/chapter.txml \