diff --git a/win/IfcParse.vcproj b/win/IfcParse.vcproj
index a7feab66a5..e55bf478ed 100644
--- a/win/IfcParse.vcproj
+++ b/win/IfcParse.vcproj
@@ -161,6 +161,10 @@
 					/>
 				</FileConfiguration>
 			</File>
+			<File
+				RelativePath="..\src\ifcparse\IfcCharacterDecoder.cpp"
+				>
+			</File>
 			<File
 				RelativePath="..\src\ifcparse\IfcParse.cpp"
 				>