diff --git a/src/util/os_misc.c b/src/util/os_misc.c
index 9f1ee8336b1..31f1c55d6e8 100644
--- a/src/util/os_misc.c
+++ b/src/util/os_misc.c
@@ -129,7 +129,6 @@ os_log_message(const char *message)
 #  include "simple_mtx.h"
 
 static struct hash_table *options_tbl;
-static simple_mtx_t options_tbl_lock = _SIMPLE_MTX_INITIALIZER_NP;
 
 static void
 options_tbl_fini(void)