diff --git a/exec/main.c b/exec/main.c
index 97d7b2a4..dc5f1906 100644
--- a/exec/main.c
+++ b/exec/main.c
@@ -83,7 +83,7 @@ LOGSYS_DECLARE_SYSTEM ("corosync",
 	LOG_MODE_OUTPUT_STDERR | LOG_MODE_THREADED | LOG_MODE_FORK,
 	NULL,
 	LOG_DAEMON,
-	"[%6s] %b",
+	NULL,
 	1000000);
 
 LOGSYS_DECLARE_SUBSYS ("MAIN", LOG_INFO);
diff --git a/exec/mainconfig.c b/exec/mainconfig.c
index c55aba4c..e90a04f2 100644
--- a/exec/mainconfig.c
+++ b/exec/mainconfig.c
@@ -162,7 +162,7 @@ int corosync_main_config_read_logging (
 				logsys_format_set("%t [%6s] %b");
 			} else
 			if (strcmp (value, "off") == 0) {
-				logsys_format_set("[%6s] %b");
+				logsys_format_set(NULL);
 			} else {
 				goto parse_error;
 			}
diff --git a/test/logsys_t2.c b/test/logsys_t2.c
index 44cbcf1c..76116371 100644
--- a/test/logsys_t2.c
+++ b/test/logsys_t2.c
@@ -39,7 +39,7 @@ LOGSYS_DECLARE_SYSTEM ("logtest_t2",
 	LOG_MODE_OUTPUT_STDERR | LOG_MODE_THREADED,
 	NULL,
 	LOG_DAEMON,
-	"[%6s] %b"
+	NULL,
 	100000);
 
 LOGSYS_DECLARE_NOSUBSYS(LOG_LEVEL_INFO);
diff --git a/test/logsysbench.c b/test/logsysbench.c
index 09c3d7e9..64b7fc56 100644
--- a/test/logsysbench.c
+++ b/test/logsysbench.c
@@ -42,7 +42,7 @@ LOGSYS_DECLARE_SYSTEM ("logtest_rec",
 	LOG_MODE_OUTPUT_STDERR | LOG_MODE_THREADED,
 	NULL,
 	LOG_DAEMON,
-	"[%6s] %b",
+	NULL,
 	100000);
 
 LOGSYS_DECLARE_NOSUBSYS(LOG_LEVEL_INFO);
diff --git a/test/logsysrec.c b/test/logsysrec.c
index 6a778d73..91196413 100644
--- a/test/logsysrec.c
+++ b/test/logsysrec.c
@@ -39,7 +39,7 @@ LOGSYS_DECLARE_SYSTEM ("logtest_rec",
 	LOG_MODE_OUTPUT_STDERR | LOG_MODE_THREADED,
 	NULL,
 	LOG_DAEMON,
-	"[%6s] %b",
+	NULL,
 	100000);
 
 LOGSYS_DECLARE_NOSUBSYS(LOG_LEVEL_INFO);