diff --git a/CleanSpec.mk b/CleanSpec.mk
index 39441e1..7d42fc9 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -515,6 +515,8 @@
 # Clean up old ninja files
 $(call add-clean-step, rm -f $(OUT_DIR)/build-*-dist*.ninja)
 
+$(call add-clean-step, rm -f $(HOST_OUT)/*ts/host-libprotobuf-java-*.jar)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************