diff --git a/extractor/src/extractor.rs b/extractor/src/extractor.rs
index 1f282d8211c..bbc4ef60c2b 100644
--- a/extractor/src/extractor.rs
+++ b/extractor/src/extractor.rs
@@ -81,6 +81,25 @@ impl TrapWriter {
         file_label
     }
 
+    fn populate_numlines(&mut self, file_label: Label, tree: &Tree) {
+        let root_node = tree.root_node();
+        let start_line = root_node.start_position().row;
+        let end_line = root_node.end_position().row;
+        let total_line_count = end_line - start_line + 1;
+
+        // TODO: the code and comment counts are completely wrong
+
+        self.add_tuple(
+            "numlines",
+            vec![
+                Arg::Label(file_label),
+                Arg::Int(total_line_count),
+                Arg::Int(total_line_count),
+                Arg::Int(total_line_count),
+            ],
+        );
+    }
+
     fn populate_parent_folders(&mut self, child_label: Label, path: Option<&Path>) {
         let mut path = path;
         let mut child_label = child_label;
@@ -173,6 +192,7 @@ pub fn extract(
     let mut trap_writer = new_trap_writer();
     trap_writer.comment(format!("Auto-generated TRAP file for {}", path.display()));
     let file_label = &trap_writer.populate_file(path);
+    &trap_writer.populate_numlines(*file_label, &tree);
     let mut visitor = Visitor {
         source: &source,
         trap_writer: trap_writer,