diff --git a/bash-5.1/builtins_rust/common/src/command.rs b/bash-5.1/builtins_rust/common/src/command.rs
new file mode 100644
index 0000000000000000000000000000000000000000..c8ce39e329ae27b0f55da7e6e5b83f2a2ac89fed
--- /dev/null
+++ b/bash-5.1/builtins_rust/common/src/command.rs
@@ -0,0 +1,5 @@
+
+#[macro_export]
+macro_rules! SUBSHELL_PAREN {
+    () => { 0x02 }
+}