diff --git a/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php b/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php
index 6d6a685b7..ab9b2d660 100644
--- a/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php
+++ b/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php
@@ -496,8 +496,13 @@ class SpreadSheetFormatter implements FormatterInterface
         // 3. iterate on `keysExportElementAssociation` to store the callable
         // in cache
         foreach ($keysExportElementAssociation as $key => [$element, $data]) {
-            $this->cacheDisplayableResult[$key] =
-                $element->getLabels($key, array_unique($allValues[$key]), $data);
+            // handle the case when there is not results lines (query is empty)
+            if ([] === $allValues) {
+                $this->cacheDisplayableResult[$key] = $element->getLabels($key, ['_header'], $data);
+            } else {
+                $this->cacheDisplayableResult[$key] =
+                    $element->getLabels($key, array_unique($allValues[$key]), $data);
+            }
         }
 
         // the cache is initialized !