diff --git a/cache/jump_hash.go b/cache/jump_hash.go
index 1baf17610..ce5b68ef3 100644
--- a/cache/jump_hash.go
+++ b/cache/jump_hash.go
@@ -1,3 +1,6 @@
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: The Thanos Authors.
+
 package cache
 
 // jumpHash consistently chooses a hash bucket number in the range
diff --git a/cache/memcached_client.go b/cache/memcached_client.go
index 77e544aa1..51bb61857 100644
--- a/cache/memcached_client.go
+++ b/cache/memcached_client.go
@@ -1,3 +1,6 @@
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: The Thanos Authors.
+
 package cache
 
 import (
diff --git a/cache/memcached_server_selector.go b/cache/memcached_server_selector.go
index db0c32fd6..60c9afe94 100644
--- a/cache/memcached_server_selector.go
+++ b/cache/memcached_server_selector.go
@@ -1,3 +1,6 @@
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: The Thanos Authors.
+
 package cache
 
 import (
diff --git a/cache/util.go b/cache/util.go
index 44058d178..289388aca 100644
--- a/cache/util.go
+++ b/cache/util.go
@@ -1,3 +1,6 @@
+// Provenance-includes-license: Apache-2.0
+// Provenance-includes-copyright: The Thanos Authors.
+
 package cache
 
 import (