diff --git a/storage/innobase/handler/ha_innodb.h b/storage/innobase/handler/ha_innodb.h
index adaad543dd1..eea1a1f7cff 100644
--- a/storage/innobase/handler/ha_innodb.h
+++ b/storage/innobase/handler/ha_innodb.h
@@ -467,8 +467,8 @@ extern "C" void wsrep_thd_set_conflict_state(
 
 extern "C" void wsrep_thd_set_trx_to_replay(THD *thd, uint64 trx_id);
 
-extern "C"void wsrep_thd_LOCK(THD *thd);
-extern "C"void wsrep_thd_UNLOCK(THD *thd);
+extern "C" void wsrep_thd_LOCK(THD *thd);
+extern "C" void wsrep_thd_UNLOCK(THD *thd);
 extern "C" uint32 wsrep_thd_wsrep_rand(THD *thd);
 extern "C" time_t wsrep_thd_query_start(THD *thd);
 extern "C" my_thread_id wsrep_thd_thread_id(THD *thd);
diff --git a/storage/xtradb/handler/ha_innodb.h b/storage/xtradb/handler/ha_innodb.h
index cb7dd6b9cf4..a824f4c680a 100644
--- a/storage/xtradb/handler/ha_innodb.h
+++ b/storage/xtradb/handler/ha_innodb.h
@@ -482,8 +482,8 @@ extern "C" void wsrep_thd_set_conflict_state(
 
 extern "C" void wsrep_thd_set_trx_to_replay(THD *thd, uint64 trx_id);
 
-extern "C"void wsrep_thd_LOCK(THD *thd);
-extern "C"void wsrep_thd_UNLOCK(THD *thd);
+extern "C" void wsrep_thd_LOCK(THD *thd);
+extern "C" void wsrep_thd_UNLOCK(THD *thd);
 extern "C" uint32 wsrep_thd_wsrep_rand(THD *thd);
 extern "C" time_t wsrep_thd_query_start(THD *thd);
 extern "C" my_thread_id wsrep_thd_thread_id(THD *thd);