diff --git a/views/bootstrap/class.Bootstrap.php b/views/bootstrap/class.Bootstrap.php
index 6516c1e1a..2abdc1d56 100644
--- a/views/bootstrap/class.Bootstrap.php
+++ b/views/bootstrap/class.Bootstrap.php
@@ -1292,9 +1292,10 @@ background-image: linear-gradient(to bottom, #882222, #111111);;
 			$attrs[] = array('href', $config['remote']);
 		$attrs[] = array('data-toggle', 'modal');
 		$attrs[] = array('role', 'button');
-		if(isset($config['class']))
-			$attrs[] = array('class', $config['class']);
-		else
+		if(isset($config['class'])) {
+			if($config['class'])
+				$attrs[] = array('class', $config['class']);
+		} else
 			$attrs[] = array('class', 'btn');
 		return $attrs;
 	} /* }}} */
diff --git a/views/bootstrap4/class.Bootstrap4.php b/views/bootstrap4/class.Bootstrap4.php
index 9996345b4..1dabe4e01 100644
--- a/views/bootstrap4/class.Bootstrap4.php
+++ b/views/bootstrap4/class.Bootstrap4.php
@@ -1291,9 +1291,10 @@ background-image: linear-gradient(to bottom, #882222, #111111);;
 			$attrs[] = array('href', $config['remote']);
 		$attrs[] = array('data-toggle', 'modal');
 		$attrs[] = array('role', 'button');
-		if(isset($config['class']))
-			$attrs[] = array('class', $config['class']);
-		else
+		if(isset($config['class'])) {
+			if($config['class'])
+				$attrs[] = array('class', $config['class']);
+		} else
 			$attrs[] = array('class', 'btn');
 		return $attrs;
 	} /* }}} */