--- a/src/common/autoconfig.h.in
+++ b/src/common/autoconfig.h.in
@@ -14,6 +14,11 @@
 
 /* Path to the file program */
 #undef FILE_PROG
+
+/* Define to 1 if you have the <spawn.h> header file. */
+#undef HAVE_SPAWN_H
+#undef HAVE_POSIX_SPAWN
+#undef USE_POSIX_SPAWN
 
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H