diff --git a/service/transformers/CalTransformer.php b/service/transformers/CalTransformer.php
index a82f1ee19..2c74f9af0 100644
--- a/service/transformers/CalTransformer.php
+++ b/service/transformers/CalTransformer.php
@@ -79,8 +79,8 @@ private function addActivity($row, &$count)
 
         foreach($activities as &$activity)
         {
-            if ((isset($row['act']) && $activity['id'] == $row['act']) ||
-                (! isset($row['act']) && $activity['id'] == $row[-1]))
+            if ((isset($row['act']) && $activity == $row['act']) ||
+                (! isset($row['act']) && $activity == -1))
             {
                 unset($activity);
                 return;
diff --git a/service/transformers/LcaTransformer.php b/service/transformers/LcaTransformer.php
index 5029a505d..68ee075a8 100644
--- a/service/transformers/LcaTransformer.php
+++ b/service/transformers/LcaTransformer.php
@@ -107,7 +107,7 @@ private function addActivity($row, &$count)
         {
             foreach($activities as &$activity)
             {
-                if ($activity['id'] == $row['act'])
+                if ($activity == $row['act'])
                 {
                     unset($activity);
                     return null;
@@ -120,7 +120,7 @@ private function addActivity($row, &$count)
         {
             foreach($activities as &$activity)
             {
-                if ($activity['id'] == -1)
+                if ($activity == -1)
                 {
                     unset($activity);
                     return null;