diff --git a/sys/include/ztimer/xtimer_compat.h b/sys/include/ztimer/xtimer_compat.h
index 85f2b28079..daf9cab34c 100644
--- a/sys/include/ztimer/xtimer_compat.h
+++ b/sys/include/ztimer/xtimer_compat.h
@@ -7,7 +7,8 @@
  */
 
 /**
- * @ingroup   sys_ztimer_util
+ * @defgroup  sys_ztimer_xtimer_compat ztimer_xtimer_compat: xtimer wrapper
+ * @ingroup   sys_ztimer
  * @{
  * @file
  * @brief   ztimer xtimer wrapper interface
diff --git a/sys/include/ztimer64/xtimer_compat.h b/sys/include/ztimer64/xtimer_compat.h
index 2bb034f7d8..3f10bbd57f 100644
--- a/sys/include/ztimer64/xtimer_compat.h
+++ b/sys/include/ztimer64/xtimer_compat.h
@@ -7,7 +7,8 @@
  */
 
 /**
- * @ingroup   sys_ztimer_util
+ * @defgroup  sys_ztimer64_xtimer_compat ztimer64_xtimer_compat: 64 Bit xtimer wrapper
+ * @ingroup   sys_ztimer64
  * @{
  * @file
  * @brief   ztimer64 xtimer wrapper interface