diff --git a/src/parse/value/parse.rs b/src/parse/value/parse.rs
index 525e831..bc9e2b1 100644
--- a/src/parse/value/parse.rs
+++ b/src/parse/value/parse.rs
@@ -604,7 +604,7 @@ impl<'a> Parser<'a> {
 
         loop {
             let key =
-                self.parse_value(true, &|c| matches!(c.peek(), Some(Token { kind: ':', .. })))?;
+                self.parse_value(true, &|c| matches!(c.peek(), Some(Token { kind: ':', .. }) | Some(Token { kind: ',', .. })))?;
 
             self.expect_char(':')?;
 
diff --git a/tests/map.rs b/tests/map.rs
index c0c3cd0..2baa05c 100644
--- a/tests/map.rs
+++ b/tests/map.rs
@@ -225,3 +225,7 @@ error!(
     first_map_value_missing_closing_paren,
     "$a: (a: b", "Error: expected \")\"."
 );
+error!(
+    denies_comma_separated_list_without_parens_as_key,
+    "$map: (a: 1, b, c, d: e);", "Error: expected \":\"."
+);