diff --git a/Include/pystate.h b/Include/pystate.h
index 4239108..1ff2626 100644
--- a/Include/pystate.h
+++ b/Include/pystate.h
@@ -29,6 +29,9 @@
 #ifdef HAVE_DLOPEN
     int dlopenflags;
 #endif
+#ifdef WITH_TSC
+    int tscdump;
+#endif
 
 } PyInterpreterState;