diff --git a/quic/core/quic_framer_test.cc b/quic/core/quic_framer_test.cc
index ea362eb..782ff03 100644
--- a/quic/core/quic_framer_test.cc
+++ b/quic/core/quic_framer_test.cc
@@ -11147,8 +11147,8 @@
 }
 
 TEST_P(QuicFramerTest, NewConnectionIdFrameVariableLength) {
-  if (!QuicUtils::VariableLengthConnectionIdAllowedForVersion(
-          framer_.transport_version())) {
+  if (framer_.transport_version() != QUIC_VERSION_99) {
+    // This frame is only for version 99.
     return;
   }
   // clang-format off
diff --git a/quic/core/quic_utils.cc b/quic/core/quic_utils.cc
index d03cc0e..d12ebeb 100644
--- a/quic/core/quic_utils.cc
+++ b/quic/core/quic_utils.cc
@@ -493,7 +493,7 @@
 // static
 bool QuicUtils::VariableLengthConnectionIdAllowedForVersion(
     QuicTransportVersion version) {
-  return version == QUIC_VERSION_99;
+  return version >= QUIC_VERSION_47;
 }
 
 // static
diff --git a/quic/core/quic_versions.h b/quic/core/quic_versions.h
index 042c95c..b23ae08 100644
--- a/quic/core/quic_versions.h
+++ b/quic/core/quic_versions.h
@@ -103,7 +103,7 @@
 
   QUIC_VERSION_46 = 46,  // Use IETF draft-17 header format with demultiplexing
                          // bit.
-  QUIC_VERSION_47 = 47,  // Use CRYPTO frames for QuicCryptoStreams.
+  QUIC_VERSION_47 = 47,  // Allow variable-length QUIC connection IDs.
   QUIC_VERSION_99 = 99,  // Dumping ground for IETF QUIC changes which are not
                          // yet ready for production.
 };
@@ -345,7 +345,7 @@
 // instead of stream 1.
 QUIC_EXPORT_PRIVATE inline bool QuicVersionUsesCryptoFrames(
     QuicTransportVersion transport_version) {
-  return transport_version >= QUIC_VERSION_47;
+  return transport_version == QUIC_VERSION_99;
 }
 
 }  // namespace quic