diff --git a/md5.c b/md5.c
index 20568d9057d7225c7d8b882a18c4751870e7ba3f..e1a254214b7824dff9dbdd42cca44d2401288557 100644
--- a/md5.c
+++ b/md5.c
@@ -1,6 +1,6 @@
 /* md5.c
  *
- * The md5 hash function.
+ * The MD5 hash function, described in RFC 1321.
  */
 
 /* nettle, low-level cryptographics library
diff --git a/md5.h b/md5.h
index c93bcc19219485d26cb8e6f422e4c664514a78d5..0859cb3ec75db7fb394a84a97fd8bc9b3ef82f56 100644
--- a/md5.h
+++ b/md5.h
@@ -1,6 +1,6 @@
 /* md5.h
  *
- * The md5 hash function.
+ * The MD5 hash function, described in RFC 1321.
  */
 
 /* nettle, low-level cryptographics library