diff --git a/table.lua b/table.lua
index 2ee2aaa..982c4bd 100644
--- a/table.lua
+++ b/table.lua
@@ -507,7 +507,7 @@ function deepcomplete(table, completions)
 end
 
 function merge_tables(table, other_table)
-	return add_all(copy(table), other_table)
+	return add_all(shallowcopy(table), other_table)
 end
 
 union = merge_tables