diff --git a/src/modules/files/configure.in b/src/modules/files/configure.in
index acc632beb3e4fdba18d46fe8cc5f372a792bf19d..e5058a6041f11304b0e1793d436fe27ef3c683ff 100644
--- a/src/modules/files/configure.in
+++ b/src/modules/files/configure.in
@@ -105,6 +105,7 @@ int main()
     AC_DEFINE(HAVE_SOLARIS_READDIR_R)
   else
     AC_MSG_RESULT(HPUX style)
+    AC_DEFINE(HAVE_HPUX_READDIR_R)
   fi
 fi