diff --git a/assets/src/scripts/monitoring-location/components/hydrograph/time-series-graph.js b/assets/src/scripts/monitoring-location/components/hydrograph/time-series-graph.js
index b868eec8eeda79a67617bb2bc7859cab13eb4bdb..52dbf010cb00a718dcb3c666b6983fdeccaeee67 100644
--- a/assets/src/scripts/monitoring-location/components/hydrograph/time-series-graph.js
+++ b/assets/src/scripts/monitoring-location/components/hydrograph/time-series-graph.js
@@ -116,33 +116,33 @@ const drawTitle = function(elem, store, siteNo, agencyCode, sitename, showMLName
     }
     titleDiv.append('div')
         .attr('class', 'primary-title')
-        .call(link(store, (elem, {title, parameter}) => {
+        .call(link(store, (elem, {title, primaryParameter}) => {
             elem.html(title);
             if (showTooltip) {
                 elem.call(
                     appendInfoTooltip,
-                    parameter ? parameter.description || 'No description available' : '',
+                    primaryParameter ? primaryParameter.description || 'No description available' : '',
                     'bottom'
                 );
             }
         }, createStructuredSelector({
             title: getTitle('primary'),
-            parameter: getPrimaryParameter
+            primaryParameter: getPrimaryParameter
         })));
     titleDiv.append('div')
         .attr('class', 'secondary-title')
-        .call(link(store, (elem, {title, parameter}) => {
+        .call(link(store, (elem, {title, secondaryParameter}) => {
             elem.html(title);
-            if (showTooltip && parameter) {
+            if (showTooltip && secondaryParameter) {
                 elem.call(
                     appendInfoTooltip,
-                    parameter ? parameter.description || 'No description available' : '',
+                    secondaryParameter ? secondaryParameter.description || 'No description available' : '',
                     'bottom'
                 );
             }
         }, createStructuredSelector({
             title: getTitle('secondary'),
-            parameter: getIVParameter('secondary')
+            secondaryParameter: getIVParameter('secondary')
         })));
 };