diff --git a/lib/rubocop/ast/node_pattern.rb b/lib/rubocop/ast/node_pattern.rb
index 9ce2af599..d9b8ff6ef 100644
--- a/lib/rubocop/ast/node_pattern.rb
+++ b/lib/rubocop/ast/node_pattern.rb
@@ -119,7 +119,7 @@ class Compiler
         ).freeze
         NUMBER       = /-?\d+(?:\.\d+)?/.freeze
         STRING       = /".+?"/.freeze
-        METHOD_NAME  = /\#?#{IDENTIFIER}[\!\?]?\(?/.freeze
+        METHOD_NAME  = /\#?#{IDENTIFIER}[!?]?\(?/.freeze
         PARAM_NUMBER = /%\d*/.freeze
 
         SEPARATORS = /[\s]+/.freeze