diff --git a/src/lj_vmprofile.c b/src/lj_vmprofile.c
index e6b49888fb..eb2ef48792 100644
--- a/src/lj_vmprofile.c
+++ b/src/lj_vmprofile.c
@@ -90,7 +90,8 @@ static void vmprofile_signal(int sig, siginfo_t *si, void *data)
     /* Handle overflow from individual trace counters. */
     trace = trace <= LJ_VMPROFILE_TRACE_MAX ? trace : 0;
     /* Phew! We have calculated the indices and now we can bump the counter. */
-    assert(vmstate >= 0 && vmstate <= LJ_VMST__MAX);
+    lua_assert(vmstate >= 0 && vmstate <= LJ_VMST__MAX);
+    lua_assert(trace >= 0 && trace <= LJ_VMPROFILE_TRACE_MAX);
     profile->count[trace][vmstate]++;
   }
 }