diff --git a/src/syslog.c b/src/syslog.c
index 206ebec..4b8b0f1 100644
--- a/src/syslog.c
+++ b/src/syslog.c
@@ -477,11 +477,21 @@ output:
 	DEC();
 	cnt = p - tbuf;
 
-	/* Output to stderr if requested. */
+	/* Output to stderr if requested, PTRIM logs only message. */
 	if (data->log_stat & LOG_PERROR) {
+		struct iovec *piov;
+		int piovcnt;
+
 		iov[iovcnt].iov_base = __UNCONST(CRLF + 1);
 		iov[iovcnt].iov_len = 1;
-		(void)writev(STDERR_FILENO, iov, iovcnt + 1);
+		if (data->log_stat & LOG_PTRIM) {
+			piov = &iov[iovcnt - 1];
+			piovcnt = 2;
+		} else {
+			piov = iov;
+			piovcnt = iovcnt + 1;
+		}
+		(void)writev(STDERR_FILENO, piov, piovcnt + 1);
 	}
 
 	/* Don't write to system log, instead use fd in log_file */
diff --git a/src/syslog.h b/src/syslog.h
index 49df25d..e1c6f47 100644
--- a/src/syslog.h
+++ b/src/syslog.h
@@ -187,7 +187,7 @@ CODE facilitynames[] = {
 #define	LOG_NDELAY	0x008	/* don't delay open */
 #define	LOG_NOWAIT	0x010	/* don't wait for console forks: DEPRECATED */
 #define	LOG_PERROR	0x020	/* log to stderr as well */
-#define	LOG_PTRIM	0x040	/* trim tag and pid from messages to stderr */
+#define	LOG_PTRIM	0x040	/* trim anything syslog addded when writing to stderr */
 #define	LOG_NLOG	0x080	/* don't write to the system log */
 #define	LOG_STDOUT	0x100	/* like nlog, for debugging syslogp() API */
 #define	LOG_RFC3164     0x200	/* Log to remote/ipc socket in old BSD format */