diff --git a/http2/hpack/decoder/hpack_entry_decoder.cc b/http2/hpack/decoder/hpack_entry_decoder.cc
index 89562a9..b227b18 100644
--- a/http2/hpack/decoder/hpack_entry_decoder.cc
+++ b/http2/hpack/decoder/hpack_entry_decoder.cc
@@ -192,7 +192,7 @@
 
 bool HpackEntryDecoder::DispatchOnType(HpackEntryDecoderListener* listener) {
   const HpackEntryType entry_type = entry_type_decoder_.entry_type();
-  const uint32_t varint = entry_type_decoder_.varint();
+  const uint64_t varint = entry_type_decoder_.varint();
   switch (entry_type) {
     case HpackEntryType::kIndexedHeader:
       // The entry consists solely of the entry type and varint. See:
diff --git a/http2/hpack/decoder/hpack_entry_type_decoder.h b/http2/hpack/decoder/hpack_entry_type_decoder.h
index 1c0f2ac..79898be 100644
--- a/http2/hpack/decoder/hpack_entry_type_decoder.h
+++ b/http2/hpack/decoder/hpack_entry_type_decoder.h
@@ -38,7 +38,7 @@
 
   // Returns the decoded variable length integer. Only call if the
   // preceding call to Start or Resume returned kDecodeDone.
-  uint32_t varint() const { return varint_decoder_.value(); }
+  uint64_t varint() const { return varint_decoder_.value(); }
 
   Http2String DebugString() const;