1 files changed, 1 insertions, 1 deletions
diff --git a/include/text.php b/include/text.php
index ad5f84b54..ec3eb7b10 100644
--- a/include/text.php
+++ b/include/text.php
@@ -3246,7 +3246,7 @@ function flatten_array_recursive($arr) {
 				$ret = array_merge($ret, $tmp);
 			}
 		}
-		elseif($a) {
+		elseif(isset($a)) {
 			$ret[] = $a;
 		}
 	}