diff --git a/openttd.dsp b/openttd.dsp
--- a/openttd.dsp
+++ b/openttd.dsp
@@ -284,6 +284,10 @@ SOURCE=.\newgrf_engine.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\newgrf_spritegroup.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\newgrf_station.c
 # End Source File
 # Begin Source File
@@ -646,6 +650,10 @@ SOURCE=.\newgrf_engine.h
 # End Source File
 # Begin Source File
 
+SOURCE=.\newgrf_spritegroup.h
+# End Source File
+# Begin Source File
+
 SOURCE=.\newgrf_station.h
 # End Source File
 # Begin Source File
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