diff --git a/xtrn/sbl/sbl.bpf b/xtrn/sbl/sbl.bpf
index a4e0191878c77bd371a2281858b0b9d3d57e5765..4d4d9faa08980844713ed3f91c478a19f80780b7 100644
--- a/xtrn/sbl/sbl.bpf
+++ b/xtrn/sbl/sbl.bpf
@@ -2,6 +2,7 @@ USEUNIT("Sbl.c");
 USEUNIT("..\SDK\Xsdkvars.c");
 USEUNIT("..\SDK\Xsdk.c");
 USELIB("D:\Borland\CBuilder5\Lib\ws2_32.lib");
+USEUNIT("..\sdk\xsdkwrap.c");
 //---------------------------------------------------------------------------
 This file is used by the project manager only and should be treated like the project file
 
diff --git a/xtrn/sbl/sbl.bpr b/xtrn/sbl/sbl.bpr
index f41549e990781a77fde7ef6e405a819ff7661671..00d8b4fdb9483164008b8b7b2af217ff88fb58c5 100644
--- a/xtrn/sbl/sbl.bpr
+++ b/xtrn/sbl/sbl.bpr
@@ -4,7 +4,7 @@
   <MACROS>
     <VERSION value="BCB.05.03"/>
     <PROJECT value="sbl.exe"/>
-    <OBJFILES value="Sbl.obj ..\SDK\Xsdkvars.obj ..\SDK\Xsdk.obj"/>
+    <OBJFILES value="Sbl.obj ..\SDK\Xsdkvars.obj ..\SDK\Xsdk.obj ..\sdk\xsdkwrap.obj"/>
     <RESFILES value=""/>
     <IDLFILES value=""/>
     <IDLGENFILES value=""/>
diff --git a/xtrn/sbl/sbl.dsp b/xtrn/sbl/sbl.dsp
index b0c1b088659473ea29a024696f4b66c0913e4f6a..089b196844908b5be80945440cf078662ac2e273 100644
--- a/xtrn/sbl/sbl.dsp
+++ b/xtrn/sbl/sbl.dsp
@@ -97,5 +97,9 @@ SOURCE=..\Sdk\xsdk.c
 
 SOURCE=..\Sdk\xsdkvars.c
 # End Source File
+# Begin Source File
+
+SOURCE=..\sdk\xsdkwrap.c
+# End Source File
 # End Target
 # End Project