diff --git a/doc/man/man1/paho_c_pub.1 b/doc/man/man1/paho_c_pub.1
index 60ec2df0..6ce0df2a 100644
--- a/doc/man/man1/paho_c_pub.1
+++ b/doc/man/man1/paho_c_pub.1
@@ -110,7 +110,7 @@ Do not print error messages.
 .TP
 .PD
 .B \-\-trace
-Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fprotocol\fR.
+Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fBprotocol\fR.
 .TP
 .PD 0
 .BI \-r
diff --git a/doc/man/man1/paho_c_sub.1 b/doc/man/man1/paho_c_sub.1
index 0f69cefd..b4ee01db 100644
--- a/doc/man/man1/paho_c_sub.1
+++ b/doc/man/man1/paho_c_sub.1
@@ -102,7 +102,7 @@ Do not print error messages.
 .TP
 .PD
 .B \-\-trace
-Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fprotocol\fR.
+Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fBprotocol\fR.
 .TP
 .PD 0
 .BI \-R
diff --git a/doc/man/man1/paho_cs_pub.1 b/doc/man/man1/paho_cs_pub.1
index 4e8f4ad7..10171c13 100644
--- a/doc/man/man1/paho_cs_pub.1
+++ b/doc/man/man1/paho_cs_pub.1
@@ -110,7 +110,7 @@ Do not print error messages.
 .TP
 .PD
 .B \-\-trace
-Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fprotocol\fR.
+Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fBprotocol\fR.
 .TP
 .PD 0
 .BI \-r
diff --git a/doc/man/man1/paho_cs_sub.1 b/doc/man/man1/paho_cs_sub.1
index 7cd2004a..a1a0b08d 100644
--- a/doc/man/man1/paho_cs_sub.1
+++ b/doc/man/man1/paho_cs_sub.1
@@ -102,7 +102,7 @@ Do not print error messages.
 .TP
 .PD
 .B \-\-trace
-Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fprotocol\fR.
+Print library internal trace.  Valid levels are \fBmin\fR, \fBmax\fR, \fBerror\fR and \fBprotocol\fR.
 .TP
 .PD 0
 .BI \-R