diff --git a/lustre/obdclass/linux/linux-sysctl.c b/lustre/obdclass/linux/linux-sysctl.c
index a15d28eee31130e65518aefa6de75a83cc2c459b..ac8b041d1eeb7d7d25801a04c3535d66f158aabf 100644
--- a/lustre/obdclass/linux/linux-sysctl.c
+++ b/lustre/obdclass/linux/linux-sysctl.c
@@ -102,6 +102,7 @@ int LL_PROC_PROTO(proc_set_timeout)
 int LL_PROC_PROTO(proc_max_dirty_pages_in_mb)
 {
         int rc = 0;
+        DECLARE_LL_PROC_PPOS_DECL;
 
         if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
                 *lenp = 0;