diff --git a/src/OpenApiType.php b/src/OpenApiType.php
index 4362673..dbb7e54 100644
--- a/src/OpenApiType.php
+++ b/src/OpenApiType.php
@@ -397,6 +397,14 @@ enum: [(int)$node->constExpr->value],
 			);
 		}
 
+		if ($node instanceof GenericTypeNode && $node->type->name === 'class-string') {
+			return new OpenApiType(
+				context: $context,
+				type: 'string',
+				minLength: 1,
+			);
+		}
+
 		if ($node instanceof ConstTypeNode) {
 			Logger::panic($context, 'Constants are not supported');
 		}
diff --git a/tests/lib/ResponseDefinitions.php b/tests/lib/ResponseDefinitions.php
index 150fd54..126f319 100644
--- a/tests/lib/ResponseDefinitions.php
+++ b/tests/lib/ResponseDefinitions.php
@@ -9,12 +9,15 @@
 
 namespace OCA\Notifications;
 
+use OCA\Notifications\Controller\AdminSettingsController;
+
 /**
  * @psalm-type NotificationsItem = array{
  *     label: string,
  *     link: string,
  *     type: string,
  *     primary: bool,
+ *     class: class-string<AdminSettingsController>,
  * }
  *
  * @psalm-type NotificationsCollection = list<NotificationsItem>
diff --git a/tests/openapi-full.json b/tests/openapi-full.json
index ff0935d..8552f7c 100644
--- a/tests/openapi-full.json
+++ b/tests/openapi-full.json
@@ -52,7 +52,8 @@
                     "label",
                     "link",
                     "type",
-                    "primary"
+                    "primary",
+                    "class"
                 ],
                 "properties": {
                     "label": {
@@ -66,6 +67,10 @@
                     },
                     "primary": {
                         "type": "boolean"
+                    },
+                    "class": {
+                        "type": "string",
+                        "minLength": 1
                     }
                 }
             },
diff --git a/tests/openapi.json b/tests/openapi.json
index 1c5bb6e..8a3b651 100644
--- a/tests/openapi.json
+++ b/tests/openapi.json
@@ -52,7 +52,8 @@
                     "label",
                     "link",
                     "type",
-                    "primary"
+                    "primary",
+                    "class"
                 ],
                 "properties": {
                     "label": {
@@ -66,6 +67,10 @@
                     },
                     "primary": {
                         "type": "boolean"
+                    },
+                    "class": {
+                        "type": "string",
+                        "minLength": 1
                     }
                 }
             },