diff --git a/src/utils.jl b/src/utils.jl
index a41161f..5163c3b 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -16,13 +16,17 @@ macro required(sig)
     model_arg = model_arg_ex.args[1]
     model_arg isa Symbol || error("malformed signature definition")
 
-    return esc(
-        quote
-            Base.@__doc__ $call_ex = $unimplemented(typeof($model_arg), $(Meta.quot(name)))
-            push!(REQUIRED_ACCESSORS, $name)
-            $name
-        end,
+    # magic to use the call-site line numbers so methods includes them
+    def = Expr(
+        :(=),
+        call_ex,
+        Expr(:block, __source__, :($unimplemented(typeof($model_arg), $(Meta.quot(name))))),
     )
+    return esc(quote
+        $def
+        push!(REQUIRED_ACCESSORS, $name)
+        Base.@__doc__ $name
+    end)
 end
 
 unimplemented(t::Type, x::Symbol) =