diff --git a/libguile/version.h b/libguile/version.h
index 41d18a49b..f585757b3 100644
--- a/libguile/version.h
+++ b/libguile/version.h
@@ -51,6 +51,7 @@
 extern SCM scm_major_version SCM_P ((void));
 extern SCM scm_minor_version SCM_P ((void));
 extern SCM scm_version SCM_P ((void));
+extern SCM scm_libguile_config_stamp SCM_P ((void));
 extern void scm_init_version SCM_P ((void));
 
 #endif  /* VERSIONH */