diff --git a/acinclude.m4 b/acinclude.m4
index 8a0a723..0a0047e 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -365,7 +365,12 @@ dnl
 AC_DEFUN(AC_GET_FS_INFO, [
     AC_CHECK_HEADERS(fcntl.h sys/dustat.h sys/param.h sys/statfs.h sys/fstyp.h)
     AC_CHECK_HEADERS(mnttab.h mntent.h utime.h sys/statvfs.h sys/vfs.h)
-    AC_CHECK_HEADERS(sys/mount.h sys/filsys.h sys/fs_types.h)
+    AC_CHECK_HEADERS(sys/filsys.h sys/fs_types.h)
+    AC_CHECK_HEADERS(sys/mount.h, [], [], 
+        [#if HAVE_SYS_PARAM_H
+         #include <sys/param.h>
+        #endif
+        ])
     AC_CHECK_FUNCS(getmntinfo)
 
     AC_CHECKING(how to get filesystem space usage)
diff --git a/docs/Makefile.am b/docs/Makefile.am
index 7355a48..4213a4c 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -62,5 +62,5 @@ pdf: @PACKAGE@.pdf
 	ln -s ./latex/refman.pdf @PACKAGE@.pdf
 
 clean-local:
-	$(RM) -r latex
-	$(RM) -r html man @PACKAGE@.ps @PACKAGE@.pdf
+	rm -f -r latex
+	rm -f -r html man @PACKAGE@.ps @PACKAGE@.pdf