diff --git a/ruby/examples/guestfs-ruby.pod b/ruby/examples/guestfs-ruby.pod
index bd8bb3108..cb9bfd0e7 100644
--- a/ruby/examples/guestfs-ruby.pod
+++ b/ruby/examples/guestfs-ruby.pod
@@ -7,7 +7,7 @@ guestfs-ruby - How to use libguestfs from Ruby
  require 'guestfs'
  g = Guestfs::Guestfs.new()
  g.add_drive_opts("disk.img",
-                  :readonly => 1, :format => "raw")
+                  :readonly => true, :format => "raw")
  g.launch()
 
 =head1 DESCRIPTION
diff --git a/ruby/examples/inspect_vm.rb b/ruby/examples/inspect_vm.rb
index abf227901..d444e01a2 100644
--- a/ruby/examples/inspect_vm.rb
+++ b/ruby/examples/inspect_vm.rb
@@ -11,7 +11,7 @@ disk = ARGV[0]
 g = Guestfs::Guestfs.new()
 
 # Attach the disk image read-only to libguestfs.
-g.add_drive_opts(disk, :readonly => 1)
+g.add_drive_opts(disk, :readonly => true)
 
 # Run the libguestfs back-end.
 g.launch()
diff --git a/ruby/t/tc_070_optargs.rb b/ruby/t/tc_070_optargs.rb
index 987b52005..2029c435f 100644
--- a/ruby/t/tc_070_optargs.rb
+++ b/ruby/t/tc_070_optargs.rb
@@ -22,9 +22,9 @@ class Test070Optargs < MiniTest::Unit::TestCase
     g = Guestfs::Guestfs.new()
 
     g.add_drive("/dev/null", {})
-    g.add_drive("/dev/null", :readonly => 1)
-    g.add_drive("/dev/null", :readonly => 1, :iface => "virtio")
+    g.add_drive("/dev/null", :readonly => true)
+    g.add_drive("/dev/null", :readonly => true, :iface => "virtio")
     g.add_drive("/dev/null",
-                :readonly => 1, :iface => "virtio", :format => "raw")
+                :readonly => true, :iface => "virtio", :format => "raw")
   end
 end