1 files changed, 10 insertions, 1 deletions

diff --git a/graph.php b/graph.php
index 1727c1b..3e33b92 100644
--- a/graph.php
+++ b/graph.php
@@ -86,7 +86,16 @@ if (isset($plugin_json[$type]['vertical'])) {
 }
 
 if (isset($plugin_json[$type]['rrdtool_opts'])) {
-        $obj->rrdtool_opts[] = $plugin_json[$type]['rrdtool_opts'];
+        $rrdtool_extra_opts = $plugin_json[$type]['rrdtool_opts'];
+        # compatibility with plugins which specify arguments as string
+        if (is_string($rrdtool_extra_opts)) {
+                $rrdtool_extra_opts = explode(' ', $rrdtool_extra_opts);
+        }
+
+        $obj->rrdtool_opts = array_merge(
+                $obj->rrdtool_opts,
+                $rrdtool_extra_opts
+        );
 }
 
 if (isset($plugin_json[$type]['datasize']) and $plugin_json[$type]['datasize'])