1 files changed, 1 insertions, 1 deletions
diff --git a/lib/csv/row.rb b/lib/csv/row.rb
index 4aa0f30911..a2d03e855f 100644
--- a/lib/csv/row.rb
+++ b/lib/csv/row.rb
@@ -50,7 +50,7 @@ class CSV
 
     def initialize_copy(other)
       super
-      @row = @row.dup
+      @row = @row.collect(&:dup)
     end
 
     # Returns +true+ if this is a header row.