diff --git a/Shorewall/changelog.txt b/Shorewall/changelog.txt
index 614e45e71..4aa909500 100644
--- a/Shorewall/changelog.txt
+++ b/Shorewall/changelog.txt
@@ -2,6 +2,8 @@ Changes in Shorewall 4.4.18.1
 
 1)  Fix params processing bug.
 
+2)  Tighten editing of TC_PRIOMAP value.
+
 Changes in Shorewall 4.4.18 Final
 
 1)  Correct handling of IPv6 host address in a net context.
diff --git a/Shorewall/releasenotes.txt b/Shorewall/releasenotes.txt
index 6dac7c57e..ae3eaa6c5 100644
--- a/Shorewall/releasenotes.txt
+++ b/Shorewall/releasenotes.txt
@@ -19,7 +19,12 @@ VI.   PROBLEMS CORRECTED AND NEW FEATURES IN PRIOR RELEASES
     problem manifested as the following type of warning:
 
        WARNING: Param line (export OLDPWD) ignored at 
-                /usr/share/shorewall/Shorewall/Config.pm line 2993.4.4.18 Final
+                /usr/share/shorewall/Shorewall/Config.pm line
+                2993.
+
+2)  The editing of the value of the TC_PRIOMAP option has been
+    tightened. Previously, many invalid settings were allowed,
+    resulting in run-time tc command failures. 
 
 4.4.18 Final