diff --git a/core/notice_files.mk b/core/notice_files.mk
index 2c0a3d3..7e61c1e 100644
--- a/core/notice_files.mk
+++ b/core/notice_files.mk
@@ -64,7 +64,7 @@
 $(installed_notice_file): $(notice_file)
 	@echo Notice file: $< -- $@
 	$(hide) mkdir -p $(dir $@)
-	$(hide) cat $< >> $@
+	$(hide) cat $< > $@
 
 ifdef LOCAL_INSTALLED_MODULE
 # Make LOCAL_INSTALLED_MODULE depend on NOTICE files if they exist