diff --git a/programs/winedbg/Makefile.in b/programs/winedbg/Makefile.in
index c57c3bfe161..04389aef5b3 100644
--- a/programs/winedbg/Makefile.in
+++ b/programs/winedbg/Makefile.in
@@ -34,6 +34,10 @@ EXTRA_OBJS = y.tab.o @LEX_OUTPUT_ROOT@.o
 y.tab.c y.tab.h: dbg.y
 	$(YACC) -d -t $(SRCDIR)/dbg.y
 
+# hack to allow parallel make
+y.tab.h: y.tab.c
+y.tab.o: y.tab.h
+
 @LEX_OUTPUT_ROOT@.c: debug.l
 	$(LEX) -8 -I $(SRCDIR)/debug.l
 
diff --git a/tools/widl/Makefile.in b/tools/widl/Makefile.in
index cd62d27deed..ab9b52cc15a 100644
--- a/tools/widl/Makefile.in
+++ b/tools/widl/Makefile.in
@@ -33,14 +33,15 @@ widl.exe: $(OBJS) $(TOPOBJDIR)/tools/wpp/libwpp.a
 y.tab.c y.tab.h: parser.y
 	$(YACC) $(YACCOPT) -d -t $(SRCDIR)/parser.y
 
+# hack to allow parallel make
+y.tab.h: y.tab.c
+y.tab.o: y.tab.h
+
 @LEX_OUTPUT_ROOT@.c: parser.l
 	$(LEX) $(LEXOPT) -d -8 $(SRCDIR)/parser.l
 
 @LEX_OUTPUT_ROOT@.o: y.tab.h
 
-clean::
-	$(RM) parser.output parser.tab.h lex.backup y.output
-
 install:: $(PROGRAMS)
 	$(MKINSTALLDIRS) $(bindir)
 	$(INSTALL_PROGRAM) widl$(EXEEXT) $(bindir)/widl$(EXEEXT)
diff --git a/tools/wmc/Makefile.in b/tools/wmc/Makefile.in
index 0d65de864af..3cd78981349 100644
--- a/tools/wmc/Makefile.in
+++ b/tools/wmc/Makefile.in
@@ -34,8 +34,9 @@ wmc.exe: $(OBJS)
 y.tab.c y.tab.h: mcy.y
 	$(YACC) $(YACCOPT) -d -t $(SRCDIR)/mcy.y
 
-clean::
-	$(RM) y.tab.c y.tab.h y.output
+# hack to allow parallel make
+y.tab.h: y.tab.c
+y.tab.o: y.tab.h
 
 install:: $(PROGRAMS)
 	$(MKINSTALLDIRS) $(bindir) $(mandir)/man$(prog_manext)
diff --git a/tools/wpp/Makefile.in b/tools/wpp/Makefile.in
index a8259650798..29f04d21163 100644
--- a/tools/wpp/Makefile.in
+++ b/tools/wpp/Makefile.in
@@ -26,6 +26,10 @@ libwpp.a: $(OBJS)
 y.tab.c y.tab.h: ppy.y
 	$(YACC) $(YACCOPT) -ppp -d -t $(SRCDIR)/ppy.y
 
+# hack to allow parallel make
+y.tab.h: y.tab.c
+y.tab.o: y.tab.h
+
 @LEX_OUTPUT_ROOT@.c: ppl.l
 	$(LEX) $(LEXOPT) -d -Ppp -o$@ -8 $(SRCDIR)/ppl.l
 
diff --git a/tools/wrc/Makefile.in b/tools/wrc/Makefile.in
index 1aaf6d72cd0..080bdb76bb2 100644
--- a/tools/wrc/Makefile.in
+++ b/tools/wrc/Makefile.in
@@ -36,14 +36,15 @@ wrc.exe: $(OBJS) $(TOPOBJDIR)/tools/wpp/libwpp.a
 y.tab.c y.tab.h: parser.y
 	$(YACC) $(YACCOPT) -d -t $(SRCDIR)/parser.y
 
+# hack to allow parallel make
+y.tab.h: y.tab.c
+y.tab.o: y.tab.h
+
 @LEX_OUTPUT_ROOT@.c: parser.l
 	$(LEX) $(LEXOPT) -d -8 $(SRCDIR)/parser.l
 
 @LEX_OUTPUT_ROOT@.o: y.tab.h
 
-clean::
-	$(RM) parser.output parser.tab.h lex.backup y.output
-
 install:: $(PROGRAMS)
 	$(MKINSTALLDIRS) $(bindir) $(mandir)/man$(prog_manext)
 	$(INSTALL_DATA) $(SRCDIR)/wrc.man $(mandir)/man$(prog_manext)/wrc.$(prog_manext)