diff --git a/src/builtin/string.rs b/src/builtin/string.rs
index 298a68a..fdf0eab 100644
--- a/src/builtin/string.rs
+++ b/src/builtin/string.rs
@@ -45,7 +45,7 @@ pub(crate) fn register(f: &mut BTreeMap<String, Builtin>) {
     decl!(f "unquote", |args, _| {
         max_args!(args, 1);
         match arg!(args, 0, "string").eval() {
-            Value::Ident(i, QuoteKind::None) if i.is_empty() => Ok(Value::Null),
+            Value::Ident(i, _) if i.is_empty() => Ok(Value::Null),
             i @ Value::Ident(..) => Ok(i.unquote()),
             v => Err(format!("$string: {} is not a string.", v).into()),
         }
diff --git a/tests/strings.rs b/tests/strings.rs
index 15f1a84..c1e9a16 100644
--- a/tests/strings.rs
+++ b/tests/strings.rs
@@ -93,6 +93,11 @@ test!(
     "a {\n  color: str-length(cde);\n}\n",
     "a {\n  color: 3;\n}\n"
 );
+test!(
+    unquote_empty_string_is_null,
+    "a {\n  color: unquote('');\n}\n",
+    ""
+);
 // blocked on refactoring how function-call args are parsed
 // right now, whitespace is eaten between idents with no
 // regard for quotes