diff --git a/vpi/sys_fst.c b/vpi/sys_fst.c
index 5d2fe3cf7..a4ba03f7d 100644
--- a/vpi/sys_fst.c
+++ b/vpi/sys_fst.c
@@ -112,8 +112,8 @@ static void show_this_item_x(struct vcd_info*info)
  * managed qsorted list of scope names/variables for duplicates bsearching
  */
 
-struct vcd_names_list_s fst_tab = { 0 };
-struct vcd_names_list_s fst_var = { 0 };
+struct vcd_names_list_s fst_tab = { 0, 0, 0, 0 };
+struct vcd_names_list_s fst_var = { 0, 0, 0, 0 };
 
 
 static int dumpvars_status = 0; /* 0:fresh 1:cb installed, 2:callback done */
diff --git a/vpi/sys_vcd.c b/vpi/sys_vcd.c
index ea4ccb7b2..c0e565aa5 100644
--- a/vpi/sys_vcd.c
+++ b/vpi/sys_vcd.c
@@ -144,8 +144,8 @@ static void show_this_item_x(struct vcd_info*info)
  * managed qsorted list of scope names/variables for duplicates bsearching
  */
 
-struct vcd_names_list_s vcd_tab = { 0 };
-struct vcd_names_list_s vcd_var = { 0 };
+struct vcd_names_list_s vcd_tab = { 0, 0, 0, 0 };
+struct vcd_names_list_s vcd_var = { 0, 0, 0, 0 };
 
 
 static int dumpvars_status = 0; /* 0:fresh 1:cb installed, 2:callback done */