diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index 77cd0755dd755ed2ab606fcd2a03e898cd4f7f46..5883eaea873f36b9e5d98de7d96169fa55357ea2 100644
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -492,7 +492,7 @@ LC_CONFIG_FILES
 
 AC_SUBST(ac_configure_args)
 
-MOSTLYCLEANFILES='.*.cmd .*.flags *.o *.ko *.mod.c'
+MOSTLYCLEANFILES='.*.cmd .*.flags *.o *.ko *.mod.c .depend'
 AC_SUBST(MOSTLYCLEANFILES)
 
 AC_OUTPUT