diff --git a/plugins/system/memory_by_process b/plugins/system/memory_by_process
old mode 100755
new mode 100644
index 48341d3f..b06e3391
--- a/plugins/system/memory_by_process
+++ b/plugins/system/memory_by_process
@@ -24,7 +24,7 @@ if [ "$1" = "config" ]; then
 	echo 'graph_category system'
 	echo "graph_info Shows contribution of each process to VM size"
 
-	ps auxww | perl '
+	ps auxww | perl -e '
 		$junk = <>;
 		while (<>)
 		{