diff --git a/vvp/vvp_net.h b/vvp/vvp_net.h
index 59689b1d3..a3b9f68db 100644
--- a/vvp/vvp_net.h
+++ b/vvp/vvp_net.h
@@ -1653,5 +1653,6 @@ inline bool vvp_net_fil_t::test_force_mask_is_zero(void) const
 #undef malloc
 #undef realloc
 #undef calloc
+#undef __ivl_alloc_H
 
 #endif