diff --git a/crates/engine/src/cmd/fileio/pdfimport.rs b/crates/engine/src/cmd/fileio/pdfimport.rs
index 28aeecd5d..e646c43f8 100644
--- a/crates/engine/src/cmd/fileio/pdfimport.rs
+++ b/crates/engine/src/cmd/fileio/pdfimport.rs
@@ -99,10 +99,10 @@ impl LoadOptions {
     }
 
     /// Does the document read only part of the file, or read it differently (a page range, another
-    /// box, a password, without its hidden layers)? Writing it back would lose the rest, so Save
-    /// doesn't (it asks for a name).
+    /// box, a password, without its hidden layers, without the VectorCraft document it carries)?
+    /// Writing it back would lose the rest, so Save doesn't (it asks for a name).
     pub fn is_partial(&self) -> bool {
-        self.pages.is_some() || self.crop != CropTo::default() || self.password.is_some() || !self.layers
+        self.pages.is_some() || self.crop != CropTo::default() || self.password.is_some() || !self.layers || !self.native
     }
 
     /// The PDF import options: `pages` resolved against the file's page count. A PDF-compatible
diff --git a/crates/engine/src/cmd/fileio/tests_pdffidelity.rs b/crates/engine/src/cmd/fileio/tests_pdffidelity.rs
index 862f3f0be..86cb84cfc 100644
--- a/crates/engine/src/cmd/fileio/tests_pdffidelity.rs
+++ b/crates/engine/src/cmd/fileio/tests_pdffidelity.rs
@@ -141,6 +141,8 @@ fn load_options_read_text_and_layers() {
     assert!(o.is_partial(), "without its hidden layers, Save doesn't write the file back");
     let d = LoadOptions::default();
     assert_eq!((d.text_as, d.layers, d.is_partial()), (TextAs::Text, true, false));
+    let n = LoadOptions { native: false, ..Default::default() };
+    assert!(n.is_partial(), "without the document it carries, Save doesn't write the file back");
 }
 
 #[test]