diff --git a/reactos/base/applications/calc/calc.rbuild b/reactos/base/applications/calc/calc.rbuild
index 325ab22970b..304a02e0c01 100644
--- a/reactos/base/applications/calc/calc.rbuild
+++ b/reactos/base/applications/calc/calc.rbuild
@@ -3,6 +3,7 @@
 <module name="calc" type="win32gui" installbase="system32" installname="calc.exe" unicode="yes">
 	<include base="calc">.</include>
 	<define name="DISABLE_HTMLHELP_SUPPORT">1</define>
+	<library>msvcrt</library>
 	<library>advapi32</library>
 	<library>gdi32</library>
 	<library>user32</library>