diff --git a/openttd.vcproj b/openttd.vcproj
--- a/openttd.vcproj
+++ b/openttd.vcproj
@@ -278,6 +278,9 @@
 				RelativePath=".\newgrf_engine.c">
 			</File>
 			<File
+				RelativePath=".\newgrf_spritegroup.c">
+			</File>
+			<File
 				RelativePath=".\newgrf_station.c">
 			</File>
 			<File
@@ -501,6 +504,9 @@
 				RelativePath=".\newgrf_engine.h">
 			</File>
 			<File
+				RelativePath=".\newgrf_spritegroup.h">
+			</File>
+			<File
 				RelativePath=".\newgrf_station.h">
 			</File>
 			<File