1 files changed, 1 insertions, 1 deletions
diff --git a/op.h b/op.h
index df2807b30f..63be5433da 100644
--- a/op.h
+++ b/op.h
@@ -608,7 +608,7 @@ typedef enum {
 #  ifdef PERL_CORE
 #    define OP_REFCNT_LOCK		MUTEX_LOCK(&PL_op_mutex)
 #    define OP_REFCNT_UNLOCK		MUTEX_UNLOCK(&PL_op_mutex)
-#  else
+#  else     /* Subject non-core uses to clang thread safety analysis */
 #    define OP_REFCNT_LOCK		op_refcnt_lock()
 #    define OP_REFCNT_UNLOCK		op_refcnt_unlock()
 #  endif