diff --git a/ttd.dsp b/ttd.dsp
index c421db9ec1..81fa94af44 100644
--- a/ttd.dsp
+++ b/ttd.dsp
@@ -293,6 +293,10 @@ SOURCE=.\sound.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\sprite.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\spritecache.c
 # End Source File
 # Begin Source File