diff --git a/lib/Makefile.Watcom b/lib/Makefile.Watcom
index 1692eaab6..4067a98c1 100644
--- a/lib/Makefile.Watcom
+++ b/lib/Makefile.Watcom
@@ -369,4 +369,6 @@ $(OBJ_DIR)\tftp.obj: tftp.c setup.h config-win32.h urldata.h cookie.h &
   ..\include\curl\curl.h ..\include\curl\curlver.h ..\include\curl\easy.h &
   ..\include\curl\multi.h formdata.h http_chunks.h hostip.h hash.h llist.h &
   transfer.h sendf.h tftp.h progress.h ..\include\curl\mprintf.h memory.h &
-  select.h memdebug.h
\ No newline at end of file
+  select.h memdebug.h
+
+$(OBJ_DIR)\splay.obj: splay.c splay.h