diff --git a/Makefile b/Makefile
index a504dae..1f4baa6 100644
--- a/Makefile
+++ b/Makefile
@@ -997,6 +997,7 @@
 	@find . $(RCS_FIND_IGNORE) \
 		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
+		-o -name '*lex.c' -o -name '.tab.[ch]' \
 		-o -name '*.symtypes' -o -name '*.bbenv.*' -o -name "*.bbenv" \) \
 		-type f -print | xargs rm -f
 
diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
index cc4ebef..1d63476 100644
--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -41,6 +41,3 @@
 
 # dependencies on generated files need to be listed explicitly
 $(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h
-
-# generated files need to be cleaned explicitly
-clean-files	:= dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 9645c07..ef8e5f9 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -179,7 +179,7 @@
 hostprogs-y := conf nconf mconf kxgettext qconf gconf
 
 clean-files	:= qconf.moc .tmp_qtcheck .tmp_gtkcheck
-clean-files	+= zconf.tab.c zconf.lex.c zconf.hash.c gconf.glade.h
+clean-files	+= zconf.hash.c gconf.glade.h
 clean-files     += config.pot linux.pot
 
 # Check that we have the required ncurses stuff installed for lxdialog (menuconfig)