diff --git a/src/pattern.c b/src/pattern.c
index 47e8aee..fe672f1 100644
--- a/src/pattern.c
+++ b/src/pattern.c
@@ -155,9 +155,7 @@
 struct list pattern_reference = LIST_HEAD_INIT(pattern_reference);
 
 static struct lru64_head *pat_lru_tree;
-#ifdef USE_THREAD
-HA_SPINLOCK_T pat_lru_tree_lock;
-#endif
+__decl_hathreads(HA_SPINLOCK_T pat_lru_tree_lock);
 static unsigned long long pat_lru_seed;
 
 /*