diff --git a/data-sources/data.tracker_activity.php b/data-sources/data.tracker_activity.php
index 9efa75a..0a5ca20 100644
--- a/data-sources/data.tracker_activity.php
+++ b/data-sources/data.tracker_activity.php
@@ -47,7 +47,7 @@ public function allowEditorToParse()
         return false;
     }
 
-    public function grab(&$param_pool=NULL)
+    public function grab(array &$param_pool = NULL)
     {
         $result = new XMLElement($this->dsParamROOTELEMENT);
         $param_output = array();
diff --git a/extension.meta.xml b/extension.meta.xml
index 6d99c74..19be380 100644
--- a/extension.meta.xml
+++ b/extension.meta.xml
@@ -18,6 +18,9 @@
 		</author>
 	</authors>
 	<releases>
+		<release version="1.5.1" date="2017-03-20" min="2.5.x" max="2.x.x">
+			- PHP7 fix
+		</release>
 		<release version="1.5.0" date="2016-03-10" min="2.5.x" max="2.x.x">
 			- Added support for notifying multiple URLs
 			- Log entry delete events