diff --git a/lib/rubocop/cop/style/single_line_methods.rb b/lib/rubocop/cop/style/single_line_methods.rb
index 4764db44cde..41bde1fbe92 100644
--- a/lib/rubocop/cop/style/single_line_methods.rb
+++ b/lib/rubocop/cop/style/single_line_methods.rb
@@ -115,7 +115,7 @@ def move_comment(node, corrector)
         end
 
         def method_body_source(method_body)
-          if method_body.arguments.empty? || method_body.parenthesized?
+          if !method_body.send_type? || method_body.arguments.empty? || method_body.parenthesized?
             method_body.source
           else
             arguments_source = method_body.arguments.map(&:source).join(', ')
diff --git a/spec/rubocop/cop/style/single_line_methods_spec.rb b/spec/rubocop/cop/style/single_line_methods_spec.rb
index 0ad0502cdf4..2802bb8f6d8 100644
--- a/spec/rubocop/cop/style/single_line_methods_spec.rb
+++ b/spec/rubocop/cop/style/single_line_methods_spec.rb
@@ -187,6 +187,12 @@ def some_method(a, b, c) = body
         RUBY
       end
 
+      it 'corrects to an endless method definition when method body is a literal' do
+        expect_correction(<<~RUBY.strip, source: 'def some_method; 42 end')
+          def some_method() = 42
+        RUBY
+      end
+
       it 'corrects to an endless method definition when single line method call with parentheses' do
         expect_correction(<<~RUBY.strip, source: 'def index() head(:ok) end')
           def index() = head(:ok)