diff --git a/src/compiler/crystal/macros/methods.cr b/src/compiler/crystal/macros/methods.cr
index 74021a7ce825..36bd79fa64e9 100644
--- a/src/compiler/crystal/macros/methods.cr
+++ b/src/compiler/crystal/macros/methods.cr
@@ -1048,11 +1048,7 @@ module Crystal
 
     private def to_double_splat(trailing_string = "")
       MacroId.new(entries.join(", ") do |entry|
-        if Symbol.needs_quotes_for_named_argument?(entry.key)
-          "#{entry.key.inspect}: #{entry.value}"
-        else
-          "#{entry.key}: #{entry.value}"
-        end
+        "#{Symbol.quote_for_named_argument(entry.key)}: #{entry.value}"
       end + trailing_string)
     end
   end
diff --git a/src/compiler/crystal/semantic/call_error.cr b/src/compiler/crystal/semantic/call_error.cr
index 89136be3dc16..a0528e83c44f 100644
--- a/src/compiler/crystal/semantic/call_error.cr
+++ b/src/compiler/crystal/semantic/call_error.cr
@@ -1032,11 +1032,7 @@ class Crystal::Call
         next if arg_type.entries.empty?
         io << ", " unless first
         arg_type.entries.join(io, ", ") do |entry|
-          if Symbol.needs_quotes_for_named_argument?(entry.name)
-            entry.name.inspect(io)
-          else
-            io << entry.name
-          end
+          Symbol.quote_for_named_argument(io, entry.name)
           io << ": " << entry.type
         end
       else
@@ -1049,11 +1045,7 @@ class Crystal::Call
     if named_args = @named_args
       io << ", " unless first
       named_args.join(io, ", ") do |named_arg|
-        if Symbol.needs_quotes_for_named_argument?(named_arg.name)
-          named_arg.name.inspect(io)
-        else
-          io << named_arg.name
-        end
+        Symbol.quote_for_named_argument(io, named_arg.name)
         io << ": " << named_arg.value.type
       end
     end
diff --git a/src/compiler/crystal/syntax/to_s.cr b/src/compiler/crystal/syntax/to_s.cr
index cdd0780bdf70..006e73778a45 100644
--- a/src/compiler/crystal/syntax/to_s.cr
+++ b/src/compiler/crystal/syntax/to_s.cr
@@ -885,11 +885,7 @@ module Crystal
     end
 
     def visit_named_arg_name(name)
-      if Symbol.needs_quotes_for_named_argument?(name)
-        name.inspect(@str)
-      else
-        @str << name
-      end
+      Symbol.quote_for_named_argument(@str, name)
     end
 
     def visit(node : Underscore)
@@ -1123,11 +1119,7 @@ module Crystal
       else
         @str << node.name
         @str << " = "
-        if Symbol.needs_quotes_for_named_argument?(node.real_name)
-          node.real_name.inspect(@str)
-        else
-          @str << node.real_name
-        end
+        Symbol.quote_for_named_argument(@str, node.real_name)
       end
       if node.args.size > 0
         @str << '('
diff --git a/src/compiler/crystal/tools/doc/macro.cr b/src/compiler/crystal/tools/doc/macro.cr
index 2dffca65b94a..49b9c30795bc 100644
--- a/src/compiler/crystal/tools/doc/macro.cr
+++ b/src/compiler/crystal/tools/doc/macro.cr
@@ -107,14 +107,11 @@ class Crystal::Doc::Macro
   def arg_to_html(arg : Arg, io, html : HTMLOption = :all)
     if arg.external_name != arg.name
       if name = arg.external_name.presence
-        if Symbol.needs_quotes_for_named_argument? name
-          if html.none?
-            name.inspect io
-          else
-            HTML.escape name.inspect, io
-          end
-        else
+        name = Symbol.quote_for_named_argument(name)
+        if html.none?
           io << name
+        else
+          HTML.escape name, io
         end
       else
         io << "_"
diff --git a/src/compiler/crystal/tools/doc/method.cr b/src/compiler/crystal/tools/doc/method.cr
index 10b223a81d76..069deb48ee61 100644
--- a/src/compiler/crystal/tools/doc/method.cr
+++ b/src/compiler/crystal/tools/doc/method.cr
@@ -272,14 +272,11 @@ class Crystal::Doc::Method
   def arg_to_html(arg : Arg, io, html : HTMLOption = :all)
     if arg.external_name != arg.name
       if name = arg.external_name.presence
-        if Symbol.needs_quotes_for_named_argument? name
-          if html.none?
-            name.inspect io
-          else
-            HTML.escape name.inspect, io
-          end
-        else
+        name = Symbol.quote_for_named_argument(name)
+        if html.none?
           io << name
+        else
+          HTML.escape name, io
         end
       else
         io << "_"
diff --git a/src/compiler/crystal/tools/doc/type.cr b/src/compiler/crystal/tools/doc/type.cr
index d8748ef898e3..619c32cd1fcd 100644
--- a/src/compiler/crystal/tools/doc/type.cr
+++ b/src/compiler/crystal/tools/doc/type.cr
@@ -517,11 +517,7 @@ class Crystal::Doc::Type
     if (named_args = node.named_args) && !named_args.empty?
       io << ", " unless node.type_vars.empty?
       named_args.join(io, ", ") do |entry|
-        if Symbol.needs_quotes_for_named_argument?(entry.name)
-          entry.name.inspect(io)
-        else
-          io << entry.name
-        end
+        Symbol.quote_for_named_argument(io, entry.name)
         io << ": "
         node_to_html entry.value, io, html: html
       end
@@ -636,11 +632,7 @@ class Crystal::Doc::Type
   def type_to_html(type : Crystal::NamedTupleInstanceType, io, text = nil, html : HTMLOption = :all)
     io << '{'
     type.entries.join(io, ", ") do |entry|
-      if Symbol.needs_quotes_for_named_argument?(entry.name)
-        entry.name.inspect(io)
-      else
-        io << entry.name
-      end
+      Symbol.quote_for_named_argument(io, entry.name)
       io << ": "
       type_to_html entry.type, io, html: html
     end
diff --git a/src/compiler/crystal/types.cr b/src/compiler/crystal/types.cr
index d4b73df92ec4..7d4bc9795a7f 100644
--- a/src/compiler/crystal/types.cr
+++ b/src/compiler/crystal/types.cr
@@ -2628,11 +2628,7 @@ module Crystal
     def to_s_with_options(io : IO, skip_union_parens : Bool = false, generic_args : Bool = true, codegen : Bool = false) : Nil
       io << "NamedTuple("
       @entries.join(io, ", ") do |entry|
-        if Symbol.needs_quotes_for_named_argument?(entry.name)
-          entry.name.inspect(io)
-        else
-          io << entry.name
-        end
+        Symbol.quote_for_named_argument(io, entry.name)
         io << ": "
         entry_type = entry.type
         entry_type = entry_type.devirtualize unless codegen
diff --git a/src/named_tuple.cr b/src/named_tuple.cr
index 3bf8abd38938..7cceb568a260 100644
--- a/src/named_tuple.cr
+++ b/src/named_tuple.cr
@@ -449,12 +449,7 @@ struct NamedTuple
       {% if i > 0 %}
         io << ", "
       {% end %}
-      key = {{key.stringify}}
-      if Symbol.needs_quotes_for_named_argument?(key)
-        key.inspect(io)
-      else
-        io << key
-      end
+      Symbol.quote_for_named_argument io, {{key.stringify}}
       io << ": "
       self[{{key.symbolize}}].inspect(io)
     {% end %}
@@ -468,12 +463,7 @@ struct NamedTuple
           pp.comma
         {% end %}
         pp.group do
-          key = {{key.stringify}}
-          if Symbol.needs_quotes_for_named_argument?(key)
-            pp.text key.inspect
-          else
-            pp.text key
-          end
+          pp.text Symbol.quote_for_named_argument({{key.stringify}})
           pp.text ": "
           pp.nest do
             pp.breakable ""
diff --git a/src/symbol.cr b/src/symbol.cr
index a3d6ffd8d4fe..88b9d0db904e 100644
--- a/src/symbol.cr
+++ b/src/symbol.cr
@@ -99,6 +99,26 @@ struct Symbol
     end
   end
 
+  # :nodoc:
+  # Appends *string* to *io* and quotes it if necessary.
+  def self.quote_for_named_argument(io : IO, string : String) : Nil
+    if needs_quotes_for_named_argument?(string)
+      string.inspect(io)
+    else
+      io << string
+    end
+  end
+
+  # :nodoc:
+  # Returns *string* and quotes it if necessary.
+  def self.quote_for_named_argument(string : String) : String
+    if needs_quotes_for_named_argument?(string)
+      string.inspect
+    else
+      string
+    end
+  end
+
   def clone
     self
   end