diff --git a/puppet/zulip_ops/files/munin-plugins/rabbitmq_messages_uncommitted b/puppet/zulip_ops/files/munin-plugins/rabbitmq_messages_uncommitted
index 94fdb1acd4..1a960c6d9c 100755
--- a/puppet/zulip_ops/files/munin-plugins/rabbitmq_messages_uncommitted
+++ b/puppet/zulip_ops/files/munin-plugins/rabbitmq_messages_uncommitted
@@ -70,4 +70,4 @@ fi
 
 HOME=$HOME rabbitmqctl list_channels name messages_uncommitted | \
 	grep -v "^Listing" | grep -v "done.$" | \
-    perl -nle'($q, $s) = split; $q =~ s/[.=-]/_/g; print("$q.value $s")'
+    perl -nle'($q, $s) = /^(.*)\s+(\d+)$/; $q =~ s/[.=-]/_/g; print("$q.value $s")'