diff --git a/tools/mage/header.yml b/tools/mage/header.yml
index 0d0570ba41..92eed359c4 100644
--- a/tools/mage/header.yml
+++ b/tools/mage/header.yml
@@ -1,6 +1,6 @@
 rules:
 - include: [.go,.js,.make,Makefile,.styl,.proto]
-  exclude: [.snap,.json,.yml,.yaml,sql,testdata,third_party,.pb.go,.pb.gw.go,.pb.paths.fm.go,.pb.setters.fm.go,.pb.validate.go]
+  exclude: [.snap,.json,.yml,.yaml,.sql,testdata,third_party,.pb.go,.pb.gw.go,.pb.paths.fm.go,.pb.setters.fm.go,.pb.validate.go]
   header:
     |
     Copyright © 20\d\d The Things Network Foundation, The Things Industries B\.V\.