diff --git a/config/hpux10.20 b/config/hpux10.20
new file mode 100644
index 0000000000..46bf4eee90
--- /dev/null
+++ b/config/hpux10.20
@@ -0,0 +1,6 @@
+# Site configuration -- do not distribute this file.
+
+if test "x$CFLAGS" = "x"; then
+   CFLAGS="-Ae"
+fi
+