diff --git a/experiments/field_trials.py b/experiments/field_trials.py
index 8af1d316f7..4c41b7e29e 100755
--- a/experiments/field_trials.py
+++ b/experiments/field_trials.py
@@ -109,7 +109,7 @@ ACTIVE_FIELD_TRIALS: FrozenSet[FieldTrial] = frozenset([
                date(2024, 4, 1)),
     FieldTrial('WebRTC-PermuteTlsClientHello',
                42225803,
-               date(2024, 7, 1)),
+               date(2025, 1, 1)),
     FieldTrial('WebRTC-QCM-Dynamic-AV1',
                349860657,
                date(2025, 7, 1)),
diff --git a/rtc_base/openssl_stream_adapter.cc b/rtc_base/openssl_stream_adapter.cc
index 46ce8b894e..9075f9a48a 100644
--- a/rtc_base/openssl_stream_adapter.cc
+++ b/rtc_base/openssl_stream_adapter.cc
@@ -290,7 +290,7 @@ OpenSSLStreamAdapter::OpenSSLStreamAdapter(
       ssl_ctx_(nullptr),
 #ifdef OPENSSL_IS_BORINGSSL
       permute_extension_(
-          webrtc::field_trial::IsEnabled("WebRTC-PermuteTlsClientHello")),
+          !webrtc::field_trial::IsDisabled("WebRTC-PermuteTlsClientHello")),
 #endif
       ssl_mode_(SSL_MODE_TLS),
       ssl_max_version_(SSL_PROTOCOL_TLS_12) {
diff --git a/rtc_base/ssl_stream_adapter_unittest.cc b/rtc_base/ssl_stream_adapter_unittest.cc
index ed96305537..ab47a19148 100644
--- a/rtc_base/ssl_stream_adapter_unittest.cc
+++ b/rtc_base/ssl_stream_adapter_unittest.cc
@@ -1674,14 +1674,23 @@ TEST_F(SSLStreamAdapterTestDTLSExtensionPermutation,
 }
 
 TEST_F(SSLStreamAdapterTestDTLSExtensionPermutation,
-       ClientDefaultServerPermute) {
-  Initialize("", "WebRTC-PermuteTlsClientHello/Enabled/");
+       ClientDisabledServerDisabled) {
+  Initialize("WebRTC-PermuteTlsClientHello/Disabled/",
+             "WebRTC-PermuteTlsClientHello/Disabled/");
   TestHandshake();
 }
 
 TEST_F(SSLStreamAdapterTestDTLSExtensionPermutation,
-       ClientPermuteServerDefault) {
-  Initialize("WebRTC-PermuteTlsClientHello/Enabled/", "");
+       ClientDisabledServerPermute) {
+  Initialize("WebRTC-PermuteTlsClientHello/Disabled/",
+             "WebRTC-PermuteTlsClientHello/Enabled/");
+  TestHandshake();
+}
+
+TEST_F(SSLStreamAdapterTestDTLSExtensionPermutation,
+       ClientPermuteServerDisabled) {
+  Initialize("WebRTC-PermuteTlsClientHello/Enabled/",
+             "WebRTC-PermuteTlsClientHello/Disabled/");
   TestHandshake();
 }