diff --git a/libguile/filesys.c b/libguile/filesys.c
index 7248bbe9f..94bf32bc6 100644
--- a/libguile/filesys.c
+++ b/libguile/filesys.c
@@ -41,6 +41,10 @@
 
 
 
+#if HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <stdio.h>
 #include <errno.h>