src/pkg/runtime/Makefile | 2 +-

diff --git a/src/pkg/runtime/Makefile b/src/pkg/runtime/Makefile
index 87c18f07f52048df6d5530484968244c28465db0..50d0515e2ab76b0578069dd1b8d3ea0a86bbbef7 100644
--- a/src/pkg/runtime/Makefile
+++ b/src/pkg/runtime/Makefile
@@ -137,7 +137,7 @@
 clean: clean-local
 
 clean-local:
-	rm -f $(AUTOHFILES) runtime_defs.go version*.go
+	rm -f $(AUTOHFILES) runtime_defs.go version*.go asm_*.h
 
 arch_GOARCH.h: arch_$(GOARCH).h
 	cp $^ $@