diff --git a/src/H5FDs3comms.c b/src/H5FDs3comms.c
index 90b694641bb..b696e0e618a 100644
--- a/src/H5FDs3comms.c
+++ b/src/H5FDs3comms.c
@@ -1566,7 +1566,7 @@ H5FD_s3comms_aws_canonical_request(char *canonical_request_dest, int _cr_size, c
 /*----------------------------------------------------------------------------
  * Function:    H5FD__s3comms_bytes_to_hex()
  *
- * Purpose:     Convert a byte string to a NUL-terminated hex string
+ * Purpose:     Create a NUL-terminated hex string from a byte array
  *
  * Return:      SUCCEED/FAIL
  *----------------------------------------------------------------------------