diff --git a/config.h.in b/config.h.in
index 9b9d9a8dc8..fedf813681 100644
--- a/config.h.in
+++ b/config.h.in
@@ -3,6 +3,9 @@
 /* Define to 1 if you have the <arpa/inet.h> header file. */
 #undef HAVE_ARPA_INET_H
 
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
 /* Define to 1 if you have the `gettimeofday' function. */
 #undef HAVE_GETTIMEOFDAY
 
@@ -111,6 +114,10 @@
 /* Define to 1 if the system has the type `_Bool'. */
 #undef HAVE__BOOL
 
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
 /* Name of package */
 #undef PACKAGE