diff --git a/lib/PhpParser/BuilderHelpers.php b/lib/PhpParser/BuilderHelpers.php
index f5bfae9ee5..c6d8f16136 100644
--- a/lib/PhpParser/BuilderHelpers.php
+++ b/lib/PhpParser/BuilderHelpers.php
@@ -189,7 +189,7 @@ public static function normalizeType($type) {
         }
 
         $builtinTypes = [
-            'array', 'callable', 'string', 'int', 'float', 'bool', 'iterable', 'void', 'object', 'mixed'
+            'array', 'callable', 'string', 'int', 'float', 'bool', 'iterable', 'void', 'object', 'mixed', 'never',
         ];
 
         $lowerType = strtolower($type);
@@ -199,12 +199,11 @@ public static function normalizeType($type) {
             $type = self::normalizeName($type);
         }
 
-        if ($nullable && (string) $type === 'void') {
-            throw new \LogicException('void type cannot be nullable');
-        }
-
-        if ($nullable && (string) $type === 'mixed') {
-            throw new \LogicException('mixed type cannot be nullable');
+        $notNullableTypes = [
+            'void', 'mixed', 'never',
+        ];
+        if ($nullable && in_array((string) $type, $notNullableTypes)) {
+            throw new \LogicException(sprintf('%s type cannot be nullable', $type));
         }
 
         return $nullable ? new NullableType($type) : $type;
diff --git a/test/PhpParser/BuilderHelpersTest.php b/test/PhpParser/BuilderHelpersTest.php
index 9376cda461..da6348f6db 100644
--- a/test/PhpParser/BuilderHelpersTest.php
+++ b/test/PhpParser/BuilderHelpersTest.php
@@ -126,6 +126,7 @@ public function testNormalizeType() {
         $this->assertEquals(new Node\Identifier('void'), BuilderHelpers::normalizeType('void'));
         $this->assertEquals(new Node\Identifier('object'), BuilderHelpers::normalizeType('object'));
         $this->assertEquals(new Node\Identifier('mixed'), BuilderHelpers::normalizeType('mixed'));
+        $this->assertEquals(new Node\Identifier('never'), BuilderHelpers::normalizeType('never'));
 
         $intIdentifier = new Node\Identifier('int');
         $this->assertSame($intIdentifier, BuilderHelpers::normalizeType($intIdentifier));
@@ -161,6 +162,12 @@ public function testNormalizeTypeNullableMixed() {
         BuilderHelpers::normalizeType('?mixed');
     }
 
+    public function testNormalizeTypeNullableNever() {
+        $this->expectException(\LogicException::class);
+        $this->expectExceptionMessage('never type cannot be nullable');
+        BuilderHelpers::normalizeType('?never');
+    }
+
     public function testNormalizeValue() {
         $expression = new Scalar\LNumber(1);
         $this->assertSame($expression, BuilderHelpers::normalizeValue($expression));