Clean Makeimplib.rules too.
diff --git a/Makefile.in b/Makefile.in
index ed2bcb1..b573e80 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -148,7 +148,7 @@
$(RM) wine
distclean: clean
- $(RM) config.* configure.lineno TAGS tags Make.rules dlls/Makedll.rules dlls/Maketest.rules programs/Makeprog.rules libs/Makelib.rules include/config.h
+ $(RM) config.* configure.lineno TAGS tags Make.rules dlls/Makedll.rules dlls/Makeimplib.rules dlls/Maketest.rules programs/Makeprog.rules libs/Makelib.rules include/config.h
$(RM) -r autom4te.cache
$(RM) `find . \( -name Makefile -o -size 0 \) -print`