diff --git a/Shorewall-common/lib.base b/Shorewall-common/lib.base
index 140a0fa8f..de6f37ec6 100644
--- a/Shorewall-common/lib.base
+++ b/Shorewall-common/lib.base
@@ -388,7 +388,7 @@ lib_avail() # $1 = Name of the Library
 
 #
 #  Note: The following set of IP address manipulation functions have anomalous
-#        behavior when the shell only supports 32-bit signed arithmatic and
+#        behavior when the shell only supports 32-bit signed arithmetic and
 #        the IP address is 128.0.0.0 or 128.0.0.1.
 #
 
diff --git a/Shorewall-perl/prog.header b/Shorewall-perl/prog.header
index 1333687da..6eb294357 100644
--- a/Shorewall-perl/prog.header
+++ b/Shorewall-perl/prog.header
@@ -276,7 +276,7 @@ load_kernel_modules() # $1 = Yes, if we are to save moduleinfo in $VARDIR
 
 #
 #  Note: The following set of IP address manipulation functions have anomalous
-#        behavior when the shell only supports 32-bit signed arithmatic and
+#        behavior when the shell only supports 32-bit signed arithmetic and
 #        the IP address is 128.0.0.0 or 128.0.0.1.
 #