diff --git a/Shorewall/Perl/Shorewall/Tc.pm b/Shorewall/Perl/Shorewall/Tc.pm
index e3c34f9a6..94c63423b 100644
--- a/Shorewall/Perl/Shorewall/Tc.pm
+++ b/Shorewall/Perl/Shorewall/Tc.pm
@@ -820,18 +820,23 @@ sub process_tc_filter( ) {
     if ( $tos ne '-' ) {
 	my $tosval = $tosoptions{$tos};
 	my $mask;
-	$tos = $tosval if $tosval;
 
-	if ( $tos =~ /^0x[0-9a-f]{2}$/ ) {
+	if ( $tosval ) {
+	    $tosval =~ s/^tos=//;
+	} else {
+	    $tosval = $tos;
+	}
+
+	if ( $tosval =~ /^0x[0-9a-f]{2}$/ ) {
 	    $mask = '0xff';
-	} elsif ( $tos =~ /^(0x[0-9a-f]{2})\/(0x[0-9a-f]{2})$/ ) {
-	    $tos = $1;
-	    $mask = $2;
+	} elsif ( $tosval =~ /^(0x[0-9a-f]{2})\/(0x[0-9a-f]{2})$/ ) {
+	    $tosval = $1;
+	    $mask   = $2;
 	} else {
 	    fatal_error "Invalid TOS ($tos)";
 	}
 
-	$rule .= "\\\n  match ip tos $tos $mask";
+	$rule .= "\\\n  match ip tos $tosval $mask";
     }
 	
     if ( $length ne '-' ) {
diff --git a/Shorewall/changelog.txt b/Shorewall/changelog.txt
index d618047e4..8bfce9d6f 100644
--- a/Shorewall/changelog.txt
+++ b/Shorewall/changelog.txt
@@ -2,6 +2,8 @@ Changes in Shorewall 4.3.13
 
 1)  Correct typo in Shorewall6 two-interface sample shorewall.conf.
 
+2)  Fix TOS mnemonic handling in /etc/shorewall/tcfilters.
+
 Changes in Shorewall 4.3.12
 
 1) Eliminate 'large quantum' warnings.
diff --git a/Shorewall/releasenotes.txt b/Shorewall/releasenotes.txt
index 3bcf35aff..ca4702b87 100644
--- a/Shorewall/releasenotes.txt
+++ b/Shorewall/releasenotes.txt
@@ -111,6 +111,9 @@ released late in 2009.
 1)  A typo in the IPv6 two-interface Sample shorewall6.conf file has
     been corrected.
 
+2)  When a valid mnemonic such as 'tos-minimize-delay' appeared in the TOS
+    column of /etc/shorewall/tcfilters, a compile-time error resulted.
+
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