diff --git a/corpus/definitions.txt b/corpus/definitions.txt
index 980601cd0..a1f773f81 100644
--- a/corpus/definitions.txt
+++ b/corpus/definitions.txt
@@ -739,6 +739,8 @@ Type definitions
 class A {
   type B = C
   type D[E] = F
+  type Abs
+  type Beta[B]
 }
 
 ---
@@ -753,7 +755,13 @@ class A {
       (type_definition
         (type_identifier)
         (type_parameters (identifier))
-        (type_identifier)))))
+          (type_identifier))
+      (type_definition
+        (type_identifier))
+      (type_definition
+        (type_identifier)
+        (type_parameters
+          (identifier))))))
 
 =======================================
 Function declarations
diff --git a/grammar.js b/grammar.js
index 996dbac50..0f5c02f23 100644
--- a/grammar.js
+++ b/grammar.js
@@ -451,8 +451,11 @@ module.exports = grammar({
       optional($.opaque_modifier),
       'type',
       $._type_constructor,
-      '=',
-      field('type', $._type)
+      optional(
+        seq(
+        '=',
+        field('type', $._type))
+      )
     )),
 
     // Created for memory-usage optimization during codegen.
diff --git a/script/smoke_test.sh b/script/smoke_test.sh
index 0d4a0be36..bdf172194 100755
--- a/script/smoke_test.sh
+++ b/script/smoke_test.sh
@@ -3,7 +3,7 @@
 # This is an integration test to generally check the quality of parsing.
 
 SCALA_SCALA_LIBRARY_EXPECTED=100
-SCALA_SCALA_COMPILER_EXPECTED=67
+SCALA_SCALA_COMPILER_EXPECTED=68
 DOTTY_COMPILER_EXPECTED=65
 
 if [ ! -d "$SCALA_SCALA_DIR" ]; then