diff --git a/src/Extractor/PgSQLResultWriter.php b/src/Extractor/PgSQLResultWriter.php
index 331637a..f9b0220 100644
--- a/src/Extractor/PgSQLResultWriter.php
+++ b/src/Extractor/PgSQLResultWriter.php
@@ -11,6 +11,7 @@
 use Keboola\DbExtractor\Configuration\PgsqlExportConfig;
 use Keboola\DbExtractor\Exception\InvalidArgumentException;
 use Keboola\DbExtractorConfig\Configuration\ValueObject\ExportConfig;
+use Psr\Log\LoggerInterface;
 
 class PgSQLResultWriter extends DefaultResultWriter
 {
@@ -28,6 +29,20 @@ public function writeToCsv(QueryResult $result, ExportConfig $exportConfig, stri
 
     protected function writeRow(array $row, CsvWriter $csvWriter): void
     {
+        // Skip and log if an unexpected non-array value is propagated as a row
+        if (!is_array($row)) {
+            $message = sprintf(
+                'PgSQLResultWriter: skipping non-array row (type: %s).',
+                gettype($row),
+            );
+            if (property_exists($this, 'logger') && $this->logger instanceof LoggerInterface) {
+                $this->logger->warning($message);
+            } else {
+                error_log($message);
+            }
+            return;
+        }
+
         if ($this->replaceBooleans) {
             array_walk($row, function (&$item): void {
                 if (is_bool($item)) {