diff --git a/playbooks/roles/zuul-executor/files/logging.conf b/playbooks/roles/zuul-executor/files/logging.conf
index 5a67076c6c..5ebd7311c8 100644
--- a/playbooks/roles/zuul-executor/files/logging.conf
+++ b/playbooks/roles/zuul-executor/files/logging.conf
@@ -47,3 +47,4 @@ args=('/var/log/zuul/executor.log',)
 [formatter_simple]
 format=%(asctime)s %(levelname)s %(name)s: %(message)s
 datefmt=
+class=zuul.lib.logutil.MultiLineFormatter
diff --git a/playbooks/roles/zuul-merger/files/logging.conf b/playbooks/roles/zuul-merger/files/logging.conf
index 1807f2a427..83c41ec183 100644
--- a/playbooks/roles/zuul-merger/files/logging.conf
+++ b/playbooks/roles/zuul-merger/files/logging.conf
@@ -47,3 +47,4 @@ args=('/var/log/zuul/merger.log',)
 [formatter_simple]
 format=%(asctime)s %(levelname)s %(name)s: %(message)s
 datefmt=
+class=zuul.lib.logutil.MultiLineFormatter
diff --git a/playbooks/roles/zuul-scheduler/files/gearman-logging.conf b/playbooks/roles/zuul-scheduler/files/gearman-logging.conf
index c662068b62..fd15139bbb 100644
--- a/playbooks/roles/zuul-scheduler/files/gearman-logging.conf
+++ b/playbooks/roles/zuul-scheduler/files/gearman-logging.conf
@@ -31,3 +31,4 @@ args=('/var/log/zuul/gearman-server.log',)
 [formatter_simple]
 format=%(asctime)s %(levelname)s %(name)s: %(message)s
 datefmt=
+class=zuul.lib.logutil.MultiLineFormatter
diff --git a/playbooks/roles/zuul-scheduler/files/logging.conf b/playbooks/roles/zuul-scheduler/files/logging.conf
index a219bc267a..27bc8698e3 100644
--- a/playbooks/roles/zuul-scheduler/files/logging.conf
+++ b/playbooks/roles/zuul-scheduler/files/logging.conf
@@ -62,3 +62,4 @@ args=('/var/log/zuul/zuul.log',)
 [formatter_simple]
 format=%(asctime)s %(levelname)s %(name)s: %(message)s
 datefmt=
+class=zuul.lib.logutil.MultiLineFormatter
diff --git a/playbooks/roles/zuul-web/files/fingergw-logging.conf b/playbooks/roles/zuul-web/files/fingergw-logging.conf
index aefbf9efed..89742361f2 100644
--- a/playbooks/roles/zuul-web/files/fingergw-logging.conf
+++ b/playbooks/roles/zuul-web/files/fingergw-logging.conf
@@ -47,3 +47,4 @@ args=('/var/log/zuul/fingergw.log',)
 [formatter_simple]
 format=%(asctime)s %(levelname)s %(name)s: %(message)s
 datefmt=
+class=zuul.lib.logutil.MultiLineFormatter
diff --git a/playbooks/roles/zuul-web/files/logging.conf b/playbooks/roles/zuul-web/files/logging.conf
index 9480c96b2e..639e7872a3 100644
--- a/playbooks/roles/zuul-web/files/logging.conf
+++ b/playbooks/roles/zuul-web/files/logging.conf
@@ -52,3 +52,4 @@ args=('/var/log/zuul/web.log',)
 [formatter_simple]
 format=%(asctime)s %(levelname)s %(name)s: %(message)s
 datefmt=
+class=zuul.lib.logutil.MultiLineFormatter