diff --git a/reactos/base/applications/calc/calc.rbuild b/reactos/base/applications/calc/calc.rbuild
index 82dc8caa99e..e2094ee3792 100644
--- a/reactos/base/applications/calc/calc.rbuild
+++ b/reactos/base/applications/calc/calc.rbuild
@@ -1,8 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
-<module name="calc" type="win32gui" installbase="system32" installname="calc.exe" allowwarnings="true">
+<module name="calc" type="win32gui" installbase="system32" installname="calc.exe" allowwarnings="true" unicode="yes">
 	<include base="calc">.</include>
-	<define name="__USE_W32API" />
 	<define name="_WIN32_IE">0x0501</define>
 	<define name="_WIN32_WINNT">0x0501</define>
 	<library>user32</library>