diff --git a/sys/include/ztimer.h b/sys/include/ztimer.h
index a0518925be2c..1f884faa69a9 100644
--- a/sys/include/ztimer.h
+++ b/sys/include/ztimer.h
@@ -302,25 +302,26 @@ struct ztimer_base {
 };
 
 /**
- * @defgroup    ztimer_now64 ztimer_now64
- * @deprecated  use uint32_t or ztimer64, will be removed after 2022.07 release.
+ * @defgroup   sys_ztimer_now64 ztimer_now64
+ * @brief 64-bit timestamp support
  *
- * @brief deprecated module changes deprecated ztimer_now_t type
+ * @deprecated use @ref ztimer_now() returning uint32_t or alternatively use
+ *             module `ztimer64` with @ref ztimer64_now() returning uint64_t.
+ *             Will be removed after 2022.10 release.
+ */
+/**
+ * @typedef ztimer_now_t
+ * @brief type for ztimer_now() result
  *
- * use ztimer_now() returning uint32_t or alternatively use module ztimer64
- * ztimer64_now() returning uint64_t.
- * @{
+ * @deprecated use @ref ztimer_now() returning uint32_t or alternatively use
+ *             module `ztimer64` with @ref ztimer64_now() returning uint64_t,
+ *             Will be removed after 2022.10 release.
  */
 #if MODULE_ZTIMER_NOW64
-typedef uint64_t ztimer_now_t;  /**< type for ztimer_now() result
-                                 * @deprecated use uint32_t or ztimer64,
-                                 * will be removed after 2022.07 release. */
+typedef uint64_t ztimer_now_t;
 #else
-typedef uint32_t ztimer_now_t;  /**< type for ztimer_now() result
-                                 * @deprecated use uint32_t or ztimer64,
-                                 * will be removed after 2022.07 release. */
+typedef uint32_t ztimer_now_t;
 #endif
-/** @}*/
 
 /**
  * @brief   ztimer structure