diff --git a/grammar.js b/grammar.js
index 8448eb8..88d95c7 100644
--- a/grammar.js
+++ b/grammar.js
@@ -424,10 +424,11 @@ module.exports = grammar({
 
     ),
 
-    generic_type: $ => seq(
+    generic_type: $ => prec.left(seq(
       $._type_identifier,
-      $.type_arguments
-    ),
+      $.type_arguments,
+      optional($.as_aliasing_type)
+    )),
 
     type_arguments: $ => seq(
       '<',
diff --git a/test/corpus/type_declarations.txt b/test/corpus/type_declarations.txt
index 5335f1e..34b6f15 100644
--- a/test/corpus/type_declarations.txt
+++ b/test/corpus/type_declarations.txt
@@ -349,6 +349,7 @@ Generic
 
 type t<'a, 'b> = (array<'a>, array<'b>)
 type t = result<(), string>
+type t<'a> = generic<'a> as 's
 
 ---
 
@@ -365,7 +366,15 @@ type t = result<(), string>
       (type_identifier)
       (type_arguments
         (unit)
-        (type_identifier)))))
+        (type_identifier))))
+
+  (type_declaration
+    (type_identifier)
+    (type_parameters (type_identifier))
+    (generic_type
+      (type_identifier)
+      (type_arguments (type_identifier))
+      (as_aliasing_type (type_identifier)))))
 
 ===========================================
 Recursive