diff --git a/libwvdrmengine/cdm/core/include/wv_cdm_constants.h b/libwvdrmengine/cdm/core/include/wv_cdm_constants.h
index ba782ff8..b4e00d7d 100644
--- a/libwvdrmengine/cdm/core/include/wv_cdm_constants.h
+++ b/libwvdrmengine/cdm/core/include/wv_cdm_constants.h
@@ -32,9 +32,9 @@ static const std::string QUERY_KEY_PERSIST_ALLOWED = "PersistAllowed";
 static const std::string QUERY_KEY_RENEW_ALLOWED = "RenewAllowed";
                                                     // "True", "False"
 static const std::string QUERY_KEY_LICENSE_DURATION_REMAINING =
-    "LicenseDurationRemaining";                     // non-negative integer
+    "LicenseDurationRemaining";        // non-negative integer denoting seconds
 static const std::string QUERY_KEY_PLAYBACK_DURATION_REMAINING =
-    "PlaybackDurationRemaining";                    // non-negative integer
+    "PlaybackDurationRemaining";      // non-negative integer denoting seconds
 static const std::string QUERY_KEY_RENEWAL_SERVER_URL = "RenewalServerUrl";
                                                     // url
 static const std::string QUERY_KEY_OEMCRYPTO_SESSION_ID = "OemCryptoSessionId";