diff --git a/sys/include/hashes/sha3.h b/sys/include/hashes/sha3.h
index ff97f7bd16bf020711888546d0ba6dca9d0dc85f..350924b17106e8669417be9eab1684a237676675 100644
--- a/sys/include/hashes/sha3.h
+++ b/sys/include/hashes/sha3.h
@@ -33,8 +33,19 @@
 extern "C" {
 #endif
 
+/**
+ * @brief   Length of SHA256 digests in bytes
+ */
 #define SHA3_256_DIGEST_LENGTH 32
+
+/**
+ * @brief   Length of SHA384 digests in bytes
+ */
 #define SHA3_384_DIGEST_LENGTH 48
+
+/**
+ * @brief   Length of SHA512 digests in bytes
+ */
 #define SHA3_512_DIGEST_LENGTH 64
 
 /**