diff --git a/src/cdk/portal/portal-errors.ts b/src/cdk/portal/portal-errors.ts
index 45d0c06b95e3..65bbfd835f21 100644
--- a/src/cdk/portal/portal-errors.ts
+++ b/src/cdk/portal/portal-errors.ts
@@ -49,7 +49,7 @@ export function throwNullPortalOutletError() {
 
 /**
  * Throws an exception when attempting to detach a portal that is not attached.
- * @docs-privatew
+ * @docs-private
  */
 export function throwNoPortalAttachedError() {
   throw Error('Attempting to detach a portal that is not attached to a host');