diff --git a/libguile/Makefile.am b/libguile/Makefile.am
index 6ed30c1f3..4870ab3d4 100644
--- a/libguile/Makefile.am
+++ b/libguile/Makefile.am
@@ -45,7 +45,9 @@ dynl-vms.c PLUGIN/REQ PLUGIN/guile.config PLUGIN/guile.libs
 ## unnecessary rebuilds.
 libpath.h: Makefile
 	echo '/* generated by Makefile */' > libpath.h
-	echo '#define LIBRARY_PATH "$(pkgdatadir)/$(VERSION)"' >> libpath.h
+	echo '#define SCM_PKGDATA_DIR "$(pkgdatadir)"' >> libpath.h
+	echo '#define SCM_LIBRARY_DIR "$(pkgdatadir)/$(VERSION)"' >> libpath.h
+	echo '#define SCM_SITE_DIR "$(pkgdatadir)/site"' >> libpath.h
 
 SUFFIXES = .x
 .c.x: