diff --git a/windows/client-management/mdm/firewall-csp.md b/windows/client-management/mdm/firewall-csp.md
index a9fdc01c6d..9c114bccc7 100644
--- a/windows/client-management/mdm/firewall-csp.md
+++ b/windows/client-management/mdm/firewall-csp.md
@@ -380,7 +380,7 @@ List of comma separated tokens specifying the remote addresses covered by the ru
 - "Internet"
 - "Ply2Renders"
 - "LocalSubnet" indicates any local address on the local subnet. This token isn't case-sensitive.
-- A subnet can be specified using either the subnet mask or network prefix notation. If neither a subnet mask not a network prefix is specified, the subnet mask defaults to 255.255.255.255.
+- A subnet can be specified using either the subnet mask or network prefix notation. If neither a subnet mask nor a network prefix is specified, the subnet mask defaults to 255.255.255.255.
 - A valid IPv6 address.
 - An IPv4 address range in the format of "start address - end address" with no spaces included.
 - An IPv6 address range in the format of "start address - end address" with no spaces included.
@@ -478,7 +478,7 @@ Value type is string. Supported operations are Add, Delete, and Get.
 Consists of one or more comma-delimited tokens specifying the addresses covered by this keyword. This value should not be set if AutoResolve is true.
 
 Valid tokens include:
-- A subnet specified using either the subnet mask or network prefix notation. If neither a subnet mask not a network prefix is specified, the subnet mask defaults to 255.255.255.255.
+- A subnet specified using either the subnet mask or network prefix notation. If neither a subnet mask nor a network prefix is specified, the subnet mask defaults to 255.255.255.255.
 - A valid IPv6 address.
 - An IPv4 address range in the format of "start address-end address" with no spaces included.
 - An IPv6 address range in the format of "start address-end address" with no spaces included.