diff --git a/changelog/fix_undefined_method_range_between.md b/changelog/fix_undefined_method_range_between.md
new file mode 100644
index 000000000000..b079fbc292bc
--- /dev/null
+++ b/changelog/fix_undefined_method_range_between.md
@@ -0,0 +1 @@
+* [#11405](https://github.com/rubocop/rubocop/issues/11405): Fix undefined method `range_between' for Style/WhileUntilModifier. ([@such][])
diff --git a/lib/rubocop/cop/mixin/statement_modifier.rb b/lib/rubocop/cop/mixin/statement_modifier.rb
index f3757dc22dd1..4755c4a6af68 100644
--- a/lib/rubocop/cop/mixin/statement_modifier.rb
+++ b/lib/rubocop/cop/mixin/statement_modifier.rb
@@ -5,6 +5,7 @@ module Cop
     # Common functionality for modifier cops.
     module StatementModifier
       include LineLengthHelp
+      include RangeHelp
 
       private
 
diff --git a/spec/support/condition_modifier_cop.rb b/spec/support/condition_modifier_cop.rb
index 354a6fa4d85b..41c3a818982c 100644
--- a/spec/support/condition_modifier_cop.rb
+++ b/spec/support/condition_modifier_cop.rb
@@ -17,6 +17,19 @@
       RUBY
     end
 
+    it 'accepts it if single line would not fit on one line and body last argument is a hash type with value omission', :ruby31 do
+      # This statement is one character too long to fit.
+      condition = 'a' * (40 - keyword.length)
+      body = "#{'b' * 35}(a:)"
+      expect("#{body} #{keyword} #{condition}".length).to eq(81)
+
+      expect_no_offenses(<<~RUBY)
+        #{keyword} #{condition}
+          #{body}
+        end
+      RUBY
+    end
+
     context 'when Layout/LineLength is disabled' do
       let(:other_cops) { { 'Layout/LineLength' => { 'Enabled' => false } } }