diff --git a/include/nuttx/sched.h b/include/nuttx/sched.h
index 667751ad5a8..130d93988f7 100644
--- a/include/nuttx/sched.h
+++ b/include/nuttx/sched.h
@@ -835,7 +835,7 @@ EXTERN uint32_t g_crit_max[1];
 #endif /* CONFIG_SCHED_CRITMONITOR */
 
 #ifdef CONFIG_DEBUG_TCBINFO
-EXTERN struct tcbinfo_s g_tcbinfo;
+EXTERN const struct tcbinfo_s g_tcbinfo;
 #endif
 
 /****************************************************************************