diff --git a/etc/gn/openthread.gni b/etc/gn/openthread.gni
index 277ee830d..72a090ec6 100644
--- a/etc/gn/openthread.gni
+++ b/etc/gn/openthread.gni
@@ -213,6 +213,9 @@ if (openthread_enable_core_config_args) {
     # Enable SRP Server support
     openthread_config_srp_server_enable = false
 
+    # Enable support for TCP
+    openthread_config_tcp_enable = true
+
     # Enable ping sender support
     openthread_config_ping_sender = false
 
diff --git a/src/core/BUILD.gn b/src/core/BUILD.gn
index 875570165..bf1b7eebc 100644
--- a/src/core/BUILD.gn
+++ b/src/core/BUILD.gn
@@ -247,6 +247,8 @@ if (openthread_enable_core_config_args) {
       defines += [ "OPENTHREAD_CONFIG_SRP_SERVER_ENABLE=1" ]
     }
 
+    defines += [ "OPENTHREAD_CONFIG_TCP_ENABLE=${openthread_config_tcp_enable}" ]
+
     if (openthread_config_ping_sender) {
       defines += [ "OPENTHREAD_CONFIG_PING_SENDER_ENABLE=1" ]
     }