diff --git a/unittest/sql/my_apc-t.cc b/unittest/sql/my_apc-t.cc
index f1a28225f41..8fb9181377a 100644
--- a/unittest/sql/my_apc-t.cc
+++ b/unittest/sql/my_apc-t.cc
@@ -190,6 +190,7 @@ int main(int args, char **argv)
   pthread_t request_thr[N_THREADS];
   int i;
 
+  my_mutex_init();
   my_thread_global_init();
 
   mysql_mutex_init(0, &apc_counters_mutex, MY_MUTEX_INIT_FAST);