diff --git a/demos/various/RT-Win32-Simulator/chconf.h b/demos/various/RT-Win32-Simulator/chconf.h
index 0a818ea7f..b64700211 100644
--- a/demos/various/RT-Win32-Simulator/chconf.h
+++ b/demos/various/RT-Win32-Simulator/chconf.h
@@ -28,6 +28,8 @@
 #ifndef _CHCONF_H_
 #define _CHCONF_H_
 
+#define CHPRINTF_USE_FLOAT          TRUE
+
   #define efiAssert(condition, message, result) { }
   #define efiAssertVoid(condition, message) { }