diff --git a/src/str.rs b/src/str.rs
index c06c33dd..f49592df 100644
--- a/src/str.rs
+++ b/src/str.rs
@@ -118,6 +118,18 @@ impl<'a> arbitrary::Arbitrary<'a> for FunctionName {
 #[derive(Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
 pub struct Identifier(Arc<str>);
 
+impl From<&str> for Identifier {
+    fn from(s: &str) -> Self {
+        Self(Arc::from(s))
+    }
+}
+
+impl AsRef<str> for Identifier {
+    fn as_ref(&self) -> &str {
+        &self.0
+    }
+}
+
 wrapped_string!(Identifier, "variable identifier");
 impl_arbitrary_lowercase_alpha!(Identifier);