diff --git a/projects/core/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua b/projects/core/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua
index dd751989b..5b9bda014 100644
--- a/projects/core/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua
+++ b/projects/core/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua
@@ -296,6 +296,13 @@ local g_tLuaKeywords = {
     ["while"] = true,
 }
 
+--- A version of the ipairs iterator which ignores metamethods
+local function inext(tbl, i)
+    i = (i or 0) + 1
+    local v = rawget(tbl, i)
+    if v == nil then return nil else return i, v end
+end
+
 local serialize_infinity = math.huge
 local function serialize_impl(t, tracking, indent, opts)
     local sType = type(t)
@@ -322,11 +329,11 @@ local function serialize_impl(t, tracking, indent, opts)
 
             result = open
             local seen_keys = {}
-            for k, v in ipairs(t) do
+            for k, v in inext, t do
                 seen_keys[k] = true
                 result = result .. sub_indent .. serialize_impl(v, tracking, sub_indent, opts) .. comma
             end
-            for k, v in pairs(t) do
+            for k, v in next, t do
                 if not seen_keys[k] then
                     local sEntry
                     if type(k) == "string" and not g_tLuaKeywords[k] and string.match(k, "^[%a_][%a%d_]*$") then
diff --git a/projects/core/src/test/resources/test-rom/spec/apis/textutils_spec.lua b/projects/core/src/test/resources/test-rom/spec/apis/textutils_spec.lua
index 3a1941ff7..482577bdb 100644
--- a/projects/core/src/test/resources/test-rom/spec/apis/textutils_spec.lua
+++ b/projects/core/src/test/resources/test-rom/spec/apis/textutils_spec.lua
@@ -118,6 +118,15 @@ describe("The textutils library", function()
             expect(textutils.serialise({ 1, 2, 3, a = 1, [false] = {} }, { compact = true }))
                 :eq("{1,2,3,a=1,[false]={},}")
         end)
+
+        it("ignores metatables", function()
+            local actual = { "a", true, x = 2 }
+            expect(textutils.serialise(setmetatable({}, { __index = actual }))):eq("{}")
+            expect(textutils.serialise(setmetatable({}, { __pairs = function() return pairs(actual) end }))):eq("{}")
+
+            expect(textutils.serialise(setmetatable({ 1 }, { __index = actual }))):eq("{\n  1,\n}")
+            expect(textutils.serialise(setmetatable({ 1 }, { __pairs = function() return pairs(actual) end }))):eq("{\n  1,\n}")
+        end)
     end)
 
     describe("textutils.unserialise", function()