diff --git a/sys/include/hashes/sha1.h b/sys/include/hashes/sha1.h
index 02ffd8dfb1ff40d09b3df65c2393441b9e475c80..f9b791c47ce4d7081ed8110abd030f19c721a5cf 100644
--- a/sys/include/hashes/sha1.h
+++ b/sys/include/hashes/sha1.h
@@ -8,7 +8,7 @@
 
 /**
  * @defgroup    sys_hashes_sha1 SHA-1
- * @ingroup     sys_hashes
+ * @ingroup     sys_hashes_unkeyed
  * @brief       Implementation of the SHA-1 hashing function
 
  * @{