diff --git a/analyze_structure.lua b/analyze_structure.lua
index 65cc1cb..b434c65 100644
--- a/analyze_structure.lua
+++ b/analyze_structure.lua
@@ -209,13 +209,17 @@ local function has_uniform_structure (t)
     -- Find the key and value types.
     local first_key = next(t)
     if first_key == nil then  return true  end
-    local key_type, value_type =  type(first_key), type(t[first_key])
+    local key_type, value_type  =  type(first_key), type(t[first_key])
+    local nr_elems  =  (value_type == 'table') and nr_elements_in_table(t[first_key]) or nil
 
     -- Ensure every other key value pair is the same.
     for key, value in pairs(t) do
         if type(key) ~= key_type or type(value) ~= value_type then
             return false
         end
+        if nr_elems and nr_elems ~= nr_elements_in_table(value) then
+            return false
+        end
     end
 
     return true