diff --git a/php/rest/getDataset.php b/php/rest/getDataset.php
index 53d1803..a14dbbc 100644
--- a/php/rest/getDataset.php
+++ b/php/rest/getDataset.php
@@ -15,7 +15,7 @@
  * @apiParam {String} [password] Password of the user in AMDA (*mandatory for user owned data*)
  * @apiParam {String} [outputFormat] Format of the returned file. Two options: `VOTable` and `ASCII`.
  * @apiParam {String} [timeFormat] Format of time in the data files. Two options: `ISO8601` and `UNIXTIME`.
- * @apiParam {String} [gzip] `1` if the file must be compressed before delivery.
+ * @apiParam {Boolean} [gzip] `1` if the file must be compressed before delivery.
  *
  * @apiSuccess {String} success `true`
  * @apiSuccess {String} dataFileURLs URL of the files matching the criteria. If the file is empty, there is no data
diff --git a/php/rest/getOrbites.php b/php/rest/getOrbites.php
index 7d8a383..bf3a69c 100644
--- a/php/rest/getOrbites.php
+++ b/php/rest/getOrbites.php
@@ -27,7 +27,7 @@
  * @apiParam {String} [password] Password of the user in AMDA (*mandatory for user owned data*)
  * @apiParam {String} [outputFormat] Format of the returned file. Two options: "VOTable", "ASCII".
  * @apiParam {String} [timeFormat] Format of time in the data files. Two options: "ISO8601", "UNIXTIME".
- * @apiParam {String} [gzip] "1" if the file must be compressed before delivery
+ * @apiParam {Boolean} [gzip] "1" if the file must be compressed before delivery
  *
  * @apiSuccess {String} success `true`
  * @apiSuccess {String} url_XYZ URL of the file containing the points.
diff --git a/php/rest/getParameter.php b/php/rest/getParameter.php
index 9d5a148..0f9d0b6 100644
--- a/php/rest/getParameter.php
+++ b/php/rest/getParameter.php
@@ -17,7 +17,7 @@
  * @apiParam {String} [password] Password of the user in AMDA (*mandatory for user owned data*)
  * @apiParam {String} [outputFormat] Format of the returned file. Two options: `VOTable` and `ASCII`.
  * @apiParam {String} [timeFormat] Format of time in the data files. Two options: `ISO8601` and `UNIXTIME`.
- * @apiParam {String} [gzip] `1` if the file must be compressed before delivery.
+ * @apiParam {Boolean} [gzip] `1` if the file must be compressed before delivery.
  *
  * @apiSuccess {String} success `true`
  * @apiSuccess {String} dataFileURLs URL of the files matching the criteria. If the file is empty, there is no data
--
libgit2 0.21.2