diff --git a/src/OPENMP/thr_data.h b/src/OPENMP/thr_data.h
index d5a290be99..cb7151ffd0 100644
--- a/src/OPENMP/thr_data.h
+++ b/src/OPENMP/thr_data.h
@@ -130,7 +130,7 @@ class ThrData {
   void *_rho1d_6;
   void *_drho1d_6;
   // my thread id
-  const int _tid;
+  int _tid;
   // timer info
   int _timer_active;
   class Timer *_timer;