diff --git a/wireshark_gen/templates/_oftype_readers.lua b/wireshark_gen/templates/_oftype_readers.lua
index b77d762..5f20d80 100644
--- a/wireshark_gen/templates/_oftype_readers.lua
+++ b/wireshark_gen/templates/_oftype_readers.lua
@@ -45,49 +45,8 @@
     read_scalar(reader, subtree, field_name, 8)
 end
 
-local hex2bin_tab = {
-        ["0"] = "0000",
-        ["1"] = "0001",
-        ["2"] = "0010",
-        ["3"] = "0011",
-        ["4"] = "0100",
-        ["5"] = "0101",
-        ["6"] = "0110",
-        ["7"] = "0111",
-        ["8"] = "1000",
-        ["9"] = "1001",
-        ["a"] = "1010",
-        ["b"] = "1011",
-        ["c"] = "1100",
-        ["d"] = "1101",
-        ["e"] = "1110",
-        ["f"] = "1111"
-        }
-
-function hex2bin(str)
-    local bin = ''
-    for byte in string.gmatch(tostring(str), '%x') do
-        bin = bin .. hex2bin_tab[byte]
-    end
-    return bin
-end
-
 function read_of_bitmap_128_t(reader, version, subtree, field_name)
-    if string.match(field_name, 'value_mask') then
-        local masked_ports = ''
-        local bitmap_string = hex2bin(reader.read(16))
-        local len = string.len(bitmap_string)
-        i = len
-        while i > 0 do
-            if string.sub(bitmap_string, i, i)  == '0' then
-                 masked_ports = masked_ports .. tostring(len - i) .. ' '
-             end
-             i = i - 1
-        end
-        subtree:add("masked_ports:", masked_ports)
-    else
-        subtree:add(fields[field_name], reader.read(16))
-    end
+    read_scalar(reader, subtree, field_name, 16)
 end
 
 function read_of_checksum_128_t(reader, version, subtree, field_name)