diff --git a/Makefile b/Makefile
index 0ee0c70102..b6a091a7d2 100644
--- a/Makefile
+++ b/Makefile
@@ -1957,6 +1957,7 @@ clean: $(clean-dirs)
 		-o -name '*.ko.*' -o -name '*.su' -o -name '*.pyc' \
 		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
 		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
+		-o -name '*.asn1.[ch]' \
 		-o -name '*.symtypes' -o -name 'modules.order' \
 		-o -name modules.builtin -o -name '.tmp_*.o.*' \
 		-o -name 'dsdt.aml' -o -name 'dsdt.asl.tmp' -o -name 'dsdt.c' \
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 26eb701f8d..6d59ea91fa 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -419,9 +419,11 @@ targets += $(multi-used-y) $(multi-used-m)
 intermediate_targets = $(foreach sfx, $(2), \
 				$(patsubst %$(strip $(1)),%$(sfx), \
 					$(filter %$(strip $(1)), $(targets))))
+# %.asn1.o <- %.asn1.[ch] <- %.asn1
 # %.lex.o <- %.lex.c <- %.l
 # %.tab.o <- %.tab.[ch] <- %.y
-targets += $(call intermediate_targets, .lex.o, .lex.c) \
+targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \
+	   $(call intermediate_targets, .lex.o, .lex.c) \
 	   $(call intermediate_targets, .tab.o, .tab.c .tab.h)
 
 # Descending