diff --git a/lib/irb/completion.rb b/lib/irb/completion.rb
index 9c3ea7836..e3ebe4abf 100644
--- a/lib/irb/completion.rb
+++ b/lib/irb/completion.rb
@@ -9,6 +9,30 @@
 
 module IRB
   class BaseCompletor # :nodoc:
+
+    # Set of reserved words used by Ruby, you should not use these for
+    # constants or variables
+    ReservedWords = %w[
+      __ENCODING__ __LINE__ __FILE__
+      BEGIN END
+      alias and
+      begin break
+      case class
+      def defined? do
+      else elsif end ensure
+      false for
+      if in
+      module
+      next nil not
+      or
+      redo rescue retry return
+      self super
+      then true
+      undef unless until
+      when while
+      yield
+    ]
+
     def completion_candidates(preposing, target, postposing, bind:)
       raise NotImplementedError
     end
@@ -98,29 +122,6 @@ def inspect
       'RegexpCompletor'
     end
 
-    # Set of reserved words used by Ruby, you should not use these for
-    # constants or variables
-    ReservedWords = %w[
-      __ENCODING__ __LINE__ __FILE__
-      BEGIN END
-      alias and
-      begin break
-      case class
-      def defined? do
-      else elsif end ensure
-      false for
-      if in
-      module
-      next nil not
-      or
-      redo rescue retry return
-      self super
-      then true
-      undef unless until
-      when while
-      yield
-    ]
-
     def complete_require_path(target, preposing, postposing)
       if target =~ /\A(['"])([^'"]+)\Z/
         quote = $1
diff --git a/lib/irb/type_completion/completor.rb b/lib/irb/type_completion/completor.rb
index 5eadc97f1..a0fc4d946 100644
--- a/lib/irb/type_completion/completor.rb
+++ b/lib/irb/type_completion/completor.rb
@@ -120,7 +120,7 @@ def candidates_from_result(result)
             end
             (scope_constants.compact | type.constants.map(&:to_s)).sort
           else
-            scope.constants.sort
+            scope.constants.sort | ReservedWords
           end
         in [:ivar, name, scope]
           ivars = scope.instance_variables.sort
@@ -134,7 +134,7 @@ def candidates_from_result(result)
         in [:call, type, name, self_call]
           (self_call ? type.all_methods : type.methods).map(&:to_s) - HIDDEN_METHODS
         in [:lvar_or_method, name, scope]
-          scope.self_type.all_methods.map(&:to_s) | scope.local_variables
+          scope.self_type.all_methods.map(&:to_s) | scope.local_variables | ReservedWords
         else
           []
         end