diff --git a/litex/boards/platforms/kcu105.py b/litex/boards/platforms/kcu105.py
index 820293b4e..da916f35e 100644
--- a/litex/boards/platforms/kcu105.py
+++ b/litex/boards/platforms/kcu105.py
@@ -498,6 +498,6 @@ 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 44]")
-        self.add_platform_command("set_property INTERNAL_VREF {{0.84}} [get_iobanks 45]")
-        self.add_platform_command("set_property INTERNAL_VREF {{0.84}} [get_iobanks 46]")
+        self.add_platform_command("set_property INTERNAL_VREF 0.84 [get_iobanks 44]")
+        self.add_platform_command("set_property INTERNAL_VREF 0.84 [get_iobanks 45]")
+        self.add_platform_command("set_property INTERNAL_VREF 0.84 [get_iobanks 46]")