diff --git a/drivers/staging/lustre/lustre/include/lustre_sec.h b/drivers/staging/lustre/lustre/include/lustre_sec.h
index d284f91def11a3047fad5974e7188515f226ff0c..4f1d9839600608ad9b5fa7665ed5f1872bed4636 100644
--- a/drivers/staging/lustre/lustre/include/lustre_sec.h
+++ b/drivers/staging/lustre/lustre/include/lustre_sec.h
@@ -329,7 +329,6 @@ static inline void sptlrpc_rule_set_init(struct sptlrpc_rule_set *set)
 	memset(set, 0, sizeof(*set));
 }
 
-int  sptlrpc_rule_set_expand(struct sptlrpc_rule_set *set);
 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 			    enum lustre_sec_part from,
 			    enum lustre_sec_part to,
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_config.c b/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
index 0309817c4ff4af7cb64c166a659b01fe9e25b5ac..0664042fe22cf850dea4500971deeea21cf7c29f 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
@@ -229,7 +229,7 @@ static void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 /*
  * return 0 if the rule set could accommodate one more rule.
  */
-int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
+static int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 {
 	struct sptlrpc_rule *rules;
 	int nslot;