diff -ur collectd-4.4.0.orig/src/rrdtool.c collectd-4.4.0/src/rrdtool.c
--- collectd-4.4.0.orig/src/rrdtool.c	2008-05-22 21:05:58.000000000 +0200
+++ collectd-4.4.0/src/rrdtool.c	2008-05-22 21:08:11.000000000 +0200
@@ -87,6 +87,7 @@
 	"HeartBeat",
 	"RRARows",
 	"RRATimespan",
+	"RRASingle",
 	"XFF"
 };
 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
@@ -1077,6 +1078,14 @@
 		}
 		xff = tmp;
 	}
+	else if (strcasecmp ("RRASingle", key) == 0)
+	{
+		if (strcasecmp("true", value) == 0)
+		{
+			rra_types_num = 1;
+			NOTICE ("rrdtool plugin: RRASingle = true: creating only AVERAGE RRAs");
+		}
+	}
 	else
 	{
 		return (-1);
Nur in collectd-4.4.0/src: rrdtool.c~.