diff --git a/book/src/guide/examples/01.mabo b/book/src/guide/examples/01.mabo
index 0bae770..1b47c22 100644
--- a/book/src/guide/examples/01.mabo
+++ b/book/src/guide/examples/01.mabo
@@ -1,4 +1,5 @@
 use other::schema::DateTime;
+
 struct User {
     first_name: string @1,
     last_name: string @2,
@@ -6,6 +7,11 @@ struct User {
     gender: option<user::Gender> @4,
     /// Latitude and longitude.
     current_location: (f64, f64) @5,
+    /// Previous three locations.
+    ///
+    /// Will be `(0.0, 0.0)` if there are less than three
+    /// history entries.
+    location_history: [(f64, f64); 3] @6,
 }
 
 mod user {
@@ -15,4 +21,3 @@ mod user {
         NonBinary(string @1) @3,
     }
 }
-
diff --git a/vscode-extension/syntaxes/mabo.tmLanguage.json b/vscode-extension/syntaxes/mabo.tmLanguage.json
index 75568eb..bc71952 100644
--- a/vscode-extension/syntaxes/mabo.tmLanguage.json
+++ b/vscode-extension/syntaxes/mabo.tmLanguage.json
@@ -277,7 +277,7 @@
     "fieldNamed": {
       "patterns": [
         {
-          "match": "\\s*([a-zA-Z0-9_]+)\\s*(:)\\s*(&?[a-zA-Z0-9_]+(?:<.+>)?)\\s*(@\\d+)?(,)?",
+          "match": "\\s*([a-zA-Z0-9_]+)\\s*(:)\\s*(&?[a-zA-Z0-9_,;\\[\\]\\(\\)\\s]+(?:<.+>)?)\\s*(@\\d+)?(,)?",
           "captures": {
             "1": {
               "name": "variable.language.mabo variable.other.mabo"
diff --git a/vscode-extension/syntaxes/mabo.tmLanguage.yaml b/vscode-extension/syntaxes/mabo.tmLanguage.yaml
index b9b1de8..4bd586d 100644
--- a/vscode-extension/syntaxes/mabo.tmLanguage.yaml
+++ b/vscode-extension/syntaxes/mabo.tmLanguage.yaml
@@ -118,7 +118,7 @@ repository:
       - include: "#fieldNamed"
   fieldNamed:
     patterns:
-      - match: \s*([a-zA-Z0-9_]+)\s*(:)\s*(&?[a-zA-Z0-9_]+(?:<.+>)?)\s*(@\d+)?(,)?
+      - match: \s*([a-zA-Z0-9_]+)\s*(:)\s*(&?[a-zA-Z0-9_,;\[\]\(\)\s]+(?:<.+>)?)\s*(@\d+)?(,)?
         captures:
           "1": { name: variable.language.mabo variable.other.mabo }
           "2": { name: punctuation.colon.mabo }