diff --git a/ChangeLog b/ChangeLog
index 9201d9f584..ad921992f0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Aug 14 11:45:09 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* common.mk (parse.h): workaround for nmake.
+
 Thu Aug 14 06:09:12 2008  Koichi Sasada  <ko1@atdot.net>
 
 	* thread.c (rb_thread_execute_interrupts): switch event
diff --git a/bcc32/Makefile.sub b/bcc32/Makefile.sub
index 6ce6d4f9bd..2434b2fef2 100644
--- a/bcc32/Makefile.sub
+++ b/bcc32/Makefile.sub
@@ -59,7 +59,6 @@ RC = brcc32
 !endif
 !ifndef YACC
 YACC = bison
-YFLAGS = -o y.tab.c
 !endif
 !ifndef AR
 AR = tlib
diff --git a/common.mk b/common.mk
index d1f8e4f8a1..40716461a9 100644
--- a/common.mk
+++ b/common.mk
@@ -390,10 +390,10 @@ enc.mk: $(srcdir)/enc/make_encmake.rb $(srcdir)/enc/Makefile.in $(srcdir)/enc/de
 PHONY:
 
 {$(VPATH)}parse.c: {$(VPATH)}parse.y $(srcdir)/tool/ytab.sed
-{$(VPATH)}parse.h: {$(VPATH)}parse.c
+parse.h {$(VPATH)}parse.h: {$(VPATH)}parse.c
 
 {$(srcdir)}.y.c:
-	$(YACC) -d $(YFLAGS) -o y.tab.c $<
+	$(YACC) -d $(YFLAGS) -o y.tab.c $(<:\=/)
 	sed -e "/^#/s!y\.tab\.h!$(@:.c=.h)!" y.tab.h > $(@:.c=.h).new
 	@$(MV) $(@:.c=.h).new $(@:.c=.h)
 	sed -f $(srcdir)/tool/ytab.sed -e "/^#/s!y\.tab\.c!$@!" y.tab.c > $@.new
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index a12eb63870..53bcc6e32b 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -58,7 +58,6 @@ CPP = $(CC) -E
 !endif
 !if !defined(YACC)
 YACC = bison
-YFLAGS = -o y.tab.c
 !endif
 AR = lib -nologo
 PURIFY =