diff --git a/sys/include/hashes/sha3.h b/sys/include/hashes/sha3.h
index 17018c4e0023fb33178e4f70325368cd79f00422..ff97f7bd16bf020711888546d0ba6dca9d0dc85f 100644
--- a/sys/include/hashes/sha3.h
+++ b/sys/include/hashes/sha3.h
@@ -13,7 +13,7 @@
 
 /**
  * @defgroup    sys_hashes_sha3 SHA-3
- * @ingroup     sys_hashes
+ * @ingroup     sys_hashes_unkeyed
  * @brief       Implementation of the SHA-3 hashing function
  * @{
  *