diff --git a/lib/securerandom.rb b/lib/securerandom.rb
index 97911d4d6a..3223c2d461 100644
--- a/lib/securerandom.rb
+++ b/lib/securerandom.rb
@@ -226,7 +226,7 @@ def uuid
     self.bytes(n)
   end
 
-  # SecureRandom.choose generates a string that randomly draws from a
+  # SecureRandom.with_chars generates a string that randomly draws from a
   # source array of characters.
   #
   # The argument _source_ specifies the array of characters from which
@@ -236,12 +236,12 @@ def uuid
   #
   # The result may contain whatever characters are in the source array.
   #
-  #   p SecureRandom.choose([*'l'..'r']) #=> "lmrqpoonmmlqlron"
-  #   p SecureRandom.choose([*'0'..'9'], 5) #=> "27309"
+  #   p SecureRandom.with_chars([*'l'..'r']) #=> "lmrqpoonmmlqlron"
+  #   p SecureRandom.with_chars([*'0'..'9'], 5) #=> "27309"
   #
   # If a secure random number generator is not available,
   # +NotImplementedError+ is raised.
-  private def choose(source, n)
+  def with_chars(source, n)
     size = source.size
     m = 1
     limit = size
@@ -288,7 +288,7 @@ def uuid
   # +NotImplementedError+ is raised.
   def alphanumeric(n=nil)
     n = 16 if n.nil?
-    choose(ALPHANUMERIC, n)
+    with_chars(ALPHANUMERIC, n)
   end
 end
 
diff --git a/test/test_securerandom.rb b/test/test_securerandom.rb
index 69d24c0417..9be4ed01dc 100644
--- a/test/test_securerandom.rb
+++ b/test/test_securerandom.rb
@@ -151,6 +151,15 @@ def test_alphanumeric
     end
   end
 
+  def test_with_chars
+    source = 'abc123'.chars
+    65.times do |n|
+      an = @it.with_chars(source, n)
+      assert_match(/\A[abc123]*\z/, an)
+      assert_equal(n, an.length)
+    end
+  end
+
   def protect
     begin
       yield