diff --git a/prisma/migrations/20250415153323_add_portnum_to_service_envelopes/migration.sql b/prisma/migrations/20250415153323_add_portnum_to_service_envelopes/migration.sql
new file mode 100644
index 0000000..20c56fe
--- /dev/null
+++ b/prisma/migrations/20250415153323_add_portnum_to_service_envelopes/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE `service_envelopes` ADD COLUMN `portnum` INTEGER NULL;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index a4d10d6..660afbb 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -204,6 +204,7 @@ model ServiceEnvelope {
   gateway_id BigInt?
   to         BigInt
   from       BigInt
+  portnum    Int?
   protobuf   Bytes
 
   created_at DateTime @default(now())
diff --git a/src/mqtt.js b/src/mqtt.js
index 702f240..2e2b502 100644
--- a/src/mqtt.js
+++ b/src/mqtt.js
@@ -750,6 +750,7 @@ client.on("message", async (topic, message) => {
                         gateway_id: envelope.gatewayId ? convertHexIdToNumericId(envelope.gatewayId) : null,
                         to: envelope.packet.to,
                         from: envelope.packet.from,
+                        portnum: portnum,
                         protobuf: message,
                     },
                 });