diff --git a/src/sg_statement.rs b/src/sg_statement.rs
index 09c3754..efd5073 100644
--- a/src/sg_statement.rs
+++ b/src/sg_statement.rs
@@ -831,6 +831,10 @@ impl Formattable for Item {
                     append_vis(out, base_indent, &mut sg, &x.vis);
                     append_whitespace(out, base_indent, &mut sg, x.static_token.span.start());
                     sg.seg(out, "static ");
+                    if let Some(x) = x.mutability {
+                        append_whitespace(out, base_indent, &mut sg, x.span.start());
+                        sg.seg(out, "mut ");
+                    }
                     sg.seg(out, &x.ident.to_string());
                     sg.seg(out, ": ");
                     sg.child(x.ty.make_segs(out, base_indent));
diff --git a/tests/roundtrip.rs b/tests/roundtrip.rs
index 6dc1a53..38667f9 100644
--- a/tests/roundtrip.rs
+++ b/tests/roundtrip.rs
@@ -387,3 +387,9 @@ fn rt_extern_c_static1() {
 }
 "#);
 }
+
+#[test]
+fn rt_static_mut1() {
+    rt(r#"static mut X: Y = Y(7);
+"#);
+}