diff --git a/CHANGES/4677.bugfix b/CHANGES/4677.bugfix
new file mode 100644
index 00000000000..c70c3750055
--- /dev/null
+++ b/CHANGES/4677.bugfix
@@ -0,0 +1 @@
+if last chunk splitted 2 parts data_received(b'0\r\n') & data_received(b'\r\n') seted wrong state PARSE_TRAILERS
diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 756db268abe..2472790f63a 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -115,6 +115,7 @@ Gennady Andreyev
 Georges Dubus
 Greg Holt
 Gregory Haynes
+Grigory Kirillov
 Gus Goulart
 Gustavo Carneiro
 Günther Jena
diff --git a/aiohttp/client_reqrep.py b/aiohttp/client_reqrep.py
index 594a4cd1f9e..2ef5dc3ac8f 100644
--- a/aiohttp/client_reqrep.py
+++ b/aiohttp/client_reqrep.py
@@ -948,7 +948,10 @@ def get_encoding(self) -> str:
             except LookupError:
                 encoding = None
         if not encoding:
-            if mimetype.type == 'application' and (mimetype.subtype == 'json' or mimetype.subtype == 'rdap'):
+            if (
+                mimetype.type == 'application' and
+                (mimetype.subtype == 'json' or mimetype.subtype == 'rdap')
+            ):
                 # RFC 7159 states that the default encoding is UTF-8.
                 # RFC 7483 defines application/rdap+json
                 encoding = 'utf-8'
diff --git a/aiohttp/http_parser.py b/aiohttp/http_parser.py
index 0a3da5bf38a..28cfafac745 100644
--- a/aiohttp/http_parser.py
+++ b/aiohttp/http_parser.py
@@ -672,6 +672,9 @@ def feed_data(self,
                         # end of stream
                         self.payload.feed_eof()
                         return True, chunk[2:]
+                    elif len(chunk) < 2:
+                        self._chunk_tail = chunk
+                        return False, b''
                     else:
                         self._chunk = ChunkState.PARSE_TRAILERS