diff --git a/tools/nettle-lfib-stream.c b/tools/nettle-lfib-stream.c
index f66690032476a1cc72643c67b23275ac319bd202..641a2f7fec06dd406b85bb2535ab558fed08c655 100644
--- a/tools/nettle-lfib-stream.c
+++ b/tools/nettle-lfib-stream.c
@@ -25,6 +25,10 @@
  * MA 02111-1307, USA.
  */
 
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include "knuth-lfib.h"
 
 #include <stdio.h>