diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 3de1499725ea3..4da2571de8ad4 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -29422,6 +29422,8 @@ else
 
     $as_echo "#define HAVE_MEMALIGN 1" >>confdefs.h
 
+    $as_echo "#define HAVE_ALIGNED_ALLOC 1" >>confdefs.h
+
   elif test "x$with_headers" != "xno"; then
 
 # Base decisions on target environment.
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index 05cdfcddbc43b..3d05e24229420 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -357,6 +357,7 @@ else
 
     AC_DEFINE(HAVE_ICONV)
     AC_DEFINE(HAVE_MEMALIGN)
+    AC_DEFINE(HAVE_ALIGNED_ALLOC)
   elif test "x$with_headers" != "xno"; then
     GLIBCXX_CROSSCONFIG
   fi