diff --git a/Shorewall/known_problems.txt b/Shorewall/known_problems.txt
index 8525d47bb..092e6e180 100644
--- a/Shorewall/known_problems.txt
+++ b/Shorewall/known_problems.txt
@@ -19,3 +19,8 @@
     to the firewall system.
 
     Corrected in Shorewall 4.4.18.1
+
+4)  If an icmp or icmp6 type/code is specified in the tcfilters file, a
+    run-time error occurs.
+
+    Corrected in Shorewall 4.4.18.1
diff --git a/Shorewall/releasenotes.txt b/Shorewall/releasenotes.txt
index 8f149081e..2ef4c4d94 100644
--- a/Shorewall/releasenotes.txt
+++ b/Shorewall/releasenotes.txt
@@ -29,7 +29,11 @@ VI.   PROBLEMS CORRECTED AND NEW FEATURES IN PRIOR RELEASES
 3)  The Shorewall Lite and Shorewall6 Lite installers now install the
     'helpers' modules file. Previously, this file was not installed 
     with the result that both 'shorewall[6]-lite show capabilities' and
-    'shorecap' failed. 
+    'shorecap' failed.
+
+4)  Previously, if an icmp or icmp6 type which included both a type and
+    a code was used in the tcfilters file, 'start' and 'restart' would
+    fail with a 'tc' error.
 
 4.4.18 Final