diff --git a/src/ui/dialog/export-single.cpp b/src/ui/dialog/export-single.cpp
index 1c75036d5abc4f70170a74892820968fdcbfceb8..89613769c2d425ef6fe642b943118277e3e1a20d 100644
--- a/src/ui/dialog/export-single.cpp
+++ b/src/ui/dialog/export-single.cpp
@@ -530,8 +530,10 @@ void SingleExport::setFilename(std::string filename, bool is_user_input)
         si_filename_entry.set_text(filename_label);
         si_filename_entry.set_position(filename_label.length());
         filenameConn.block(old_block_state);
-        filename_entry_original_value = filename_label;
     }
+
+    // Unconditionally update the original value to prevent it from becoming stale.
+    filename_entry_original_value = filename_label;
 }
 
 void SingleExport::saveExportHints(SPObject *target)