diff --git a/nixos/modules/services/networking/firewall.nix b/nixos/modules/services/networking/firewall.nix
index aba64e4f60ff..73feba242a11 100644
--- a/nixos/modules/services/networking/firewall.nix
+++ b/nixos/modules/services/networking/firewall.nix
@@ -263,7 +263,7 @@ let
 
   commonOptions = {
     allowedTCPPorts = mkOption {
-      type = types.listOf types.int;
+      type = types.listOf types.port;
       default = [ ];
       example = [ 22 80 ];
       description =
@@ -274,7 +274,7 @@ let
     };
 
     allowedTCPPortRanges = mkOption {
-      type = types.listOf (types.attrsOf types.int);
+      type = types.listOf (types.attrsOf types.port);
       default = [ ];
       example = [ { from = 8999; to = 9003; } ];
       description =
@@ -285,7 +285,7 @@ let
     };
 
     allowedUDPPorts = mkOption {
-      type = types.listOf types.int;
+      type = types.listOf types.port;
       default = [ ];
       example = [ 53 ];
       description =
@@ -295,7 +295,7 @@ let
     };
 
     allowedUDPPortRanges = mkOption {
-      type = types.listOf (types.attrsOf types.int);
+      type = types.listOf (types.attrsOf types.port);
       default = [ ];
       example = [ { from = 60000; to = 61000; } ];
       description =