diff --git a/boot/bootdata/packages/reactos.dff.in b/boot/bootdata/packages/reactos.dff.in
index 9fef574ae7..d7c132db30 100644
--- a/boot/bootdata/packages/reactos.dff.in
+++ b/boot/bootdata/packages/reactos.dff.in
@@ -114,6 +114,7 @@ Signature = "$Windows NT$"
 "modules/optional/alcxwdm.inf"                        6  optional
 "modules/optional/alcxwdm.sys"                        3  optional
 "modules/optional/net21x4.inf"                        6  optional
+"modules/optional/calc.chm"                          19  optional
 "modules/optional/dc21x4.sys"                         3  optional
 "modules/optional/mfc42.dll"                          2  optional
 "modules/optional/mfc42u.dll"                         2  optional