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-rw-r--r--ext/tk/lib/multi-tk.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/tk/lib/multi-tk.rb b/ext/tk/lib/multi-tk.rb
index 268246fa73..a38f079ad2 100644
--- a/ext/tk/lib/multi-tk.rb
+++ b/ext/tk/lib/multi-tk.rb
@@ -71,6 +71,7 @@ class MultiTkIp
def initialize(ip, cmd)
@ip = ip
@cmd = cmd
+ freeze
end
attr_reader :ip, :cmd
def inspect