diff --git a/develop/untests.lua b/develop/untests.lua
index 7af682b..04f3a36 100644
--- a/develop/untests.lua
+++ b/develop/untests.lua
@@ -1262,6 +1262,22 @@ do
 end
 
 do
+    do
+        local f1, f2 = evo.id(2)
+        evo.set(f2, evo.DEFAULT, 42)
+
+        local e1 = evo.entity():set(f1, 11):build()
+        local e2 = evo.entity():set(f1, 21):set(f2, 22):build()
+
+        assert(evo.get(e1, f1) == 11 and evo.get(e1, f2) == nil)
+        assert(evo.get(e2, f1) == 21 and evo.get(e2, f2) == 22)
+
+        local q = evo.query():include(f1):build()
+        assert(evo.batch_insert(q, f2) == 1)
+
+        assert(evo.get(e1, f1) == 11 and evo.get(e1, f2) == 42)
+        assert(evo.get(e2, f1) == 21 and evo.get(e2, f2) == 22)
+    end
     do
         local f1, f2, f3, f4 = evo.id(4)
 
diff --git a/evolved.lua b/evolved.lua
index bb48af6..0068b6e 100644
--- a/evolved.lua
+++ b/evolved.lua
@@ -1064,7 +1064,7 @@ local function __chunk_insert(chunk, fragment, ...)
         local new_component_index = new_component_indices[fragment]
         if new_component_index then
             local new_component_storage = new_component_storages[new_component_index]
-            if chunk.__has_defaults_or_constructs and __fragment_has_default_or_construct(fragment) then
+            if new_chunk.__has_defaults_or_constructs and __fragment_has_default_or_construct(fragment) then
                 for new_place = new_size + 1, new_size + old_size do
                     local entity = new_entities[new_place]
                     local new_component = __component_construct(fragment, ...)
@@ -1094,7 +1094,7 @@ local function __chunk_insert(chunk, fragment, ...)
         local new_component_index = new_component_indices[fragment]
         if new_component_index then
             local new_component_storage = new_component_storages[new_component_index]
-            if chunk.__has_defaults_or_constructs and __fragment_has_default_or_construct(fragment) then
+            if new_chunk.__has_defaults_or_constructs and __fragment_has_default_or_construct(fragment) then
                 for new_place = new_size + 1, new_size + old_size do
                     local new_component = __component_construct(fragment, ...)
                     new_component_storage[new_place] = new_component