diff --git a/lib/msf/core/exploit/sip.rb b/lib/msf/core/exploit/sip.rb
index 2087ddaa00..ffcc091fe8 100644
--- a/lib/msf/core/exploit/sip.rb
+++ b/lib/msf/core/exploit/sip.rb
@@ -1,4 +1,4 @@
-# encoding: UTF-8
+# -*- coding: binary -*-
 
 require 'rex/proto/sip/response'
 
diff --git a/lib/rex/proto/sip.rb b/lib/rex/proto/sip.rb
index 1a3c67546b..2550ee0948 100644
--- a/lib/rex/proto/sip.rb
+++ b/lib/rex/proto/sip.rb
@@ -1,4 +1,4 @@
-# encoding: UTF-8
+# -*- coding: binary -*-
 
 # SIP protocol support
 require 'rex/proto/sip/response'
diff --git a/lib/rex/proto/sip/response.rb b/lib/rex/proto/sip/response.rb
index 7fd9233ef8..c770fc54b6 100644
--- a/lib/rex/proto/sip/response.rb
+++ b/lib/rex/proto/sip/response.rb
@@ -1,4 +1,4 @@
-# encoding: UTF-8
+# -*- coding: binary -*-
 
 module Rex
   module Proto
diff --git a/modules/auxiliary/scanner/sip/options.rb b/modules/auxiliary/scanner/sip/options.rb
index 7acf4b25bd..b44a84f30a 100644
--- a/modules/auxiliary/scanner/sip/options.rb
+++ b/modules/auxiliary/scanner/sip/options.rb
@@ -1,4 +1,4 @@
-# encoding: UTF-8
+# -*- coding: binary -*-
 ##
 # This module requires Metasploit: http//metasploit.com/download
 # Current source: https://github.com/rapid7/metasploit-framework
diff --git a/modules/auxiliary/scanner/sip/options_tcp.rb b/modules/auxiliary/scanner/sip/options_tcp.rb
index ccf8569bb2..5f064f55b2 100644
--- a/modules/auxiliary/scanner/sip/options_tcp.rb
+++ b/modules/auxiliary/scanner/sip/options_tcp.rb
@@ -1,4 +1,4 @@
-# encoding: UTF-8
+# -*- coding: binary -*-
 ##
 # This module requires Metasploit: http//metasploit.com/download
 # Current source: https://github.com/rapid7/metasploit-framework
diff --git a/spec/lib/rex/proto/sip/response_spec.rb b/spec/lib/rex/proto/sip/response_spec.rb
index 6c3561d7cd..2f9715bd93 100644
--- a/spec/lib/rex/proto/sip/response_spec.rb
+++ b/spec/lib/rex/proto/sip/response_spec.rb
@@ -1,4 +1,4 @@
-# encoding: UTF-8
+# -*- coding: binary -*-
 
 require 'rex/proto/sip/response'