Trying to fix a notice, refs #10731

1 files changed, 6 insertions, 1 deletions

diff --git a/plugins/CoreVisualizations/Visualizations/Sparklines.php b/plugins/CoreVisualizations/Visualizations/Sparklines.php
index 82cdf959cc..8ee6f60401 100644
--- a/plugins/CoreVisualizations/Visualizations/Sparklines.php
+++ b/plugins/CoreVisualizations/Visualizations/Sparklines.php
@@ -59,7 +59,12 @@ class Sparklines extends ViewDataTable
         $columnsList = array();
         if ($this->config->hasSparklineMetrics()) {
             foreach ($this->config->getSparklineMetrics() as $cols) {
-                $columnsList = array_merge($cols['columns'], $columnsList);
+                $columns = $cols['columns'];
+                if (!is_array($columns)) {
+                    $columns = array($columns);
+                }
+
+                $columnsList = array_merge($columns, $columnsList);
             }
         }