diff --git a/dlls/engine/msvc8/engine.vcproj b/dlls/engine/msvc8/engine.vcproj
index e87c36ac..8518940e 100644
--- a/dlls/engine/msvc8/engine.vcproj
+++ b/dlls/engine/msvc8/engine.vcproj
@@ -185,6 +185,10 @@
 			Filter="cpp;c;cxx;def;odl;idl;hpj;bat;asm;asmx"
 			UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}"
 			>
+			<File
+				RelativePath="..\amxmod_compat.cpp"
+				>
+			</File>
 			<File
 				RelativePath="..\amxxapi.cpp"
 				>
@@ -211,6 +215,10 @@
 			Filter="h;hpp;hxx;hm;inl;inc;xsd"
 			UniqueIdentifier="{93995380-89BD-4b04-88EB-625FBE52EBFB}"
 			>
+			<File
+				RelativePath="..\amxmod_compat.h"
+				>
+			</File>
 			<File
 				RelativePath="..\CString.h"
 				>