Remove Maketest.rules on distclean.

diff --git a/Makefile.in b/Makefile.in
index f92d1da..d459484 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -157,7 +157,7 @@
 	$(RM) wine
 
 distclean: clean
-	$(RM) config.* TAGS Make.rules dlls/Makedll.rules programs/Makeprog.rules include/config.h
+	$(RM) config.* TAGS Make.rules dlls/Makedll.rules dlls/Maketest.rules programs/Makeprog.rules include/config.h
 	$(RM) -r autom4te.cache
 	$(RM) `find . \( -name Makefile -o -size 0 \) -print`