diff --git a/zcl/json/public.go b/zcl/json/public.go
index c2f0285..5d20467 100644
--- a/zcl/json/public.go
+++ b/zcl/json/public.go
@@ -33,6 +33,7 @@ func Parse(src []byte, filename string) (*zcl.File, zcl.Diagnostics) {
 			Body: &body{
 				obj: rootNode.(*objectVal),
 			},
+			Bytes: src,
 		}
 	}
 	return file, diags
diff --git a/zcl/structure.go b/zcl/structure.go
index ec1ac60..36e431f 100644
--- a/zcl/structure.go
+++ b/zcl/structure.go
@@ -6,7 +6,8 @@ import (
 
 // File is the top-level node that results from parsing a ZCL file.
 type File struct {
-	Body Body
+	Body  Body
+	Bytes []byte
 }
 
 // Block represents a nested block within a Body.