diff --git a/litex_boards/platforms/zcu104.py b/litex_boards/platforms/zcu104.py
index 59c643f..01ce502 100644
--- a/litex_boards/platforms/zcu104.py
+++ b/litex_boards/platforms/zcu104.py
@@ -142,5 +142,6 @@ class Platform(XilinxPlatform):
 
     def do_finalize(self, fragment):
         XilinxPlatform.do_finalize(self, fragment)
+        self.add_platform_command("set_property INTERNAL_VREF 0.84 [get_iobanks 64]")
         self.add_platform_command("set_property INTERNAL_VREF 0.84 [get_iobanks 65]")
         self.add_platform_command("set_property INTERNAL_VREF 0.84 [get_iobanks 66]")