diff --git a/dist/tools/doccheck/check.sh b/dist/tools/doccheck/check.sh
index c0154d46fb..3766378d2f 100755
--- a/dist/tools/doccheck/check.sh
+++ b/dist/tools/doccheck/check.sh
@@ -67,8 +67,8 @@ exclude_filter() {
 
 # Check groups are correctly defined (e.g. no undefined groups and no group
 # defined multiple times)
-ALL_RAW_DEFGROUP=$(git grep -n @defgroup -- '*.h' '*.c' '*.txt' | exclude_filter)
-ALL_RAW_INGROUP=$(git grep -n '@ingroup' -- '*.h' '*.c' '*.txt' | exclude_filter)
+ALL_RAW_DEFGROUP=$(git grep -n @defgroup -- '*.h' '*.hpp' '*.txt' 'makefiles/pseudomodules.inc.mk' 'sys/net/gnrc/routing/ipv6_auto_subnets/gnrc_ipv6_auto_subnets.c'| exclude_filter)
+ALL_RAW_INGROUP=$(git grep -n '@ingroup' -- '*.h' '*.hpp' '*.txt' 'makefiles/pseudomodules.inc.mk' 'sys/net/gnrc/routing/ipv6_auto_subnets/gnrc_ipv6_auto_subnets.c'| exclude_filter)
 DEFINED_GROUPS=$(echo "${ALL_RAW_DEFGROUP}" | \
                     grep -oE '@defgroup[ ]+[^ ]+' | \
                     grep -oE '[^ ]+$' | \
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