diff --git a/lib/reline/config.rb b/lib/reline/config.rb
index 315a3d127d..04357c3694 100644
--- a/lib/reline/config.rb
+++ b/lib/reline/config.rb
@@ -184,7 +184,7 @@ class Reline::Config
 
   def bind_variable(name, value)
     case name
-    when VARIABLE_NAMES then
+    when *VARIABLE_NAMES then
       variable_name = :"@#{name.tr(?-, ?_)}"
       instance_variable_set(variable_name, value.nil? || value == '1' || value == 'on')
     when 'bell-style'
diff --git a/test/reline/test_config.rb b/test/reline/test_config.rb
index ce2fa409a1..dd5142d587 100644
--- a/test/reline/test_config.rb
+++ b/test/reline/test_config.rb
@@ -28,6 +28,14 @@ class Reline::Config::Test < Reline::TestCase
     assert_equal :audible, @config.instance_variable_get(:@bell_style)
   end
 
+  def test_read_lines_with_variable
+    @config.read_lines(<<~LINES.lines)
+      set disable-completion on
+    LINES
+
+    assert_equal true, @config.instance_variable_get(:@disable_completion)
+  end
+
   def test_comment_line
     @config.read_lines([" #a: error\n"])
     assert_not_include @config.key_bindings, nil