diff --git a/vvp/vvp.def b/vvp/vvp.def
index 3d4f16f88..a745529b0 100644
--- a/vvp/vvp.def
+++ b/vvp/vvp.def
@@ -6,6 +6,7 @@ vpi_flush
 vpi_fopen
 vpi_free_object
 vpi_get
+vpi_get_delays
 vpi_get_file
 vpi_get_str
 vpi_get_time
@@ -23,6 +24,7 @@ vpi_mcd_open
 vpi_mcd_printf
 vpi_mcd_vprintf
 vpi_printf
+vpi_put_delays
 vpi_put_userdata
 vpi_put_value
 vpi_register_cb