diff --git a/org_mode_samples/object/text_markup/double_star.org b/org_mode_samples/object/text_markup/double_star.org
new file mode 100644
index 0000000..c758a3d
--- /dev/null
+++ b/org_mode_samples/object/text_markup/double_star.org
@@ -0,0 +1 @@
+foo ** bar ** baz
diff --git a/src/parser/text_markup.rs b/src/parser/text_markup.rs
index 8a7549f..5cae3f6 100644
--- a/src/parser/text_markup.rs
+++ b/src/parser/text_markup.rs
@@ -163,8 +163,7 @@ fn text_markup_object<'c>(
     OrgSource<'s>,
 ) -> Res<OrgSource<'s>, Vec<Object<'s>>>
        + 'c {
-    let marker_symbol = marker_symbol.to_owned();
-    move |context, input: OrgSource<'_>| _text_markup_object(context, input, marker_symbol.as_str())
+    move |context, input: OrgSource<'_>| _text_markup_object(context, input, marker_symbol)
 }
 
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]