diff --git a/quic/core/qpack/qpack_decoder.cc b/quic/core/qpack/qpack_decoder.cc
index 9268c9f..67d6a4e 100644
--- a/quic/core/qpack/qpack_decoder.cc
+++ b/quic/core/qpack/qpack_decoder.cc
@@ -74,15 +74,15 @@
   if (is_static) {
     auto entry = header_table_.LookupEntry(/* is_static = */ true, name_index);
     if (!entry) {
-      encoder_stream_error_delegate_->OnEncoderStreamError(
-          "Invalid static table entry.");
+      OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                      "Invalid static table entry.");
       return;
     }
 
     entry = header_table_.InsertEntry(entry->name(), value);
     if (!entry) {
-      encoder_stream_error_delegate_->OnEncoderStreamError(
-          "Error inserting entry with name reference.");
+      OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                      "Error inserting entry with name reference.");
     }
     return;
   }
@@ -90,22 +90,21 @@
   uint64_t absolute_index;
   if (!QpackEncoderStreamRelativeIndexToAbsoluteIndex(
           name_index, header_table_.inserted_entry_count(), &absolute_index)) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Invalid relative index.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR, "Invalid relative index.");
     return;
   }
 
   const QpackEntry* entry =
       header_table_.LookupEntry(/* is_static = */ false, absolute_index);
   if (!entry) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Dynamic table entry not found.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                    "Dynamic table entry not found.");
     return;
   }
   entry = header_table_.InsertEntry(entry->name(), value);
   if (!entry) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Error inserting entry with name reference.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                    "Error inserting entry with name reference.");
   }
 }
 
@@ -113,8 +112,8 @@
                                                 absl::string_view value) {
   const QpackEntry* entry = header_table_.InsertEntry(name, value);
   if (!entry) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Error inserting literal entry.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                    "Error inserting literal entry.");
   }
 }
 
@@ -122,34 +121,35 @@
   uint64_t absolute_index;
   if (!QpackEncoderStreamRelativeIndexToAbsoluteIndex(
           index, header_table_.inserted_entry_count(), &absolute_index)) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Invalid relative index.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR, "Invalid relative index.");
     return;
   }
 
   const QpackEntry* entry =
       header_table_.LookupEntry(/* is_static = */ false, absolute_index);
   if (!entry) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Dynamic table entry not found.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                    "Dynamic table entry not found.");
     return;
   }
   entry = header_table_.InsertEntry(entry->name(), entry->value());
   if (!entry) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Error inserting duplicate entry.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                    "Error inserting duplicate entry.");
   }
 }
 
 void QpackDecoder::OnSetDynamicTableCapacity(uint64_t capacity) {
   if (!header_table_.SetDynamicTableCapacity(capacity)) {
-    encoder_stream_error_delegate_->OnEncoderStreamError(
-        "Error updating dynamic table capacity.");
+    OnErrorDetected(QUIC_QPACK_ENCODER_STREAM_ERROR,
+                    "Error updating dynamic table capacity.");
   }
 }
 
-void QpackDecoder::OnErrorDetected(absl::string_view error_message) {
-  encoder_stream_error_delegate_->OnEncoderStreamError(error_message);
+void QpackDecoder::OnErrorDetected(QuicErrorCode /* error_code */,
+                                   absl::string_view error_message) {
+  encoder_stream_error_delegate_->OnEncoderStreamError(
+      QUIC_QPACK_ENCODER_STREAM_ERROR, error_message);
 }
 
 std::unique_ptr<QpackProgressiveDecoder> QpackDecoder::CreateProgressiveDecoder(