diff --git a/libguile/strports.c b/libguile/strports.c
index 419a2df1a..54a7cc895 100644
--- a/libguile/strports.c
+++ b/libguile/strports.c
@@ -42,6 +42,10 @@
 
 
 
+#if HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include "libguile/_scm.h"
 
 #include <stdio.h>