diff --git a/src/llhttp/http.ts b/src/llhttp/http.ts
index 91d995ef..5a670931 100644
--- a/src/llhttp/http.ts
+++ b/src/llhttp/http.ts
@@ -797,7 +797,7 @@ export class HTTP {
 
     n('chunk_size_otherwise')
       .match('\r', n('chunk_size_almost_done'))
-      .match([ ';', ' ' ], n('chunk_parameters'))
+      .match('; ', n('chunk_parameters'))
       .otherwise(p.error(ERROR.INVALID_CHUNK_SIZE,
         'Invalid character in chunk size'));
 
diff --git a/test/request/transfer-encoding.md b/test/request/transfer-encoding.md
index 194bf16e..53831602 100644
--- a/test/request/transfer-encoding.md
+++ b/test/request/transfer-encoding.md
@@ -232,6 +232,37 @@ off=157 chunk complete
 off=160 chunk header len=0
 ```
 
+### No semicolon before chunk parameters
+
+<!-- meta={"type": "request"} -->
+```http
+POST /chunked_w_unicorns_after_length HTTP/1.1
+Host: localhost
+Transfer-encoding: chunked
+
+2 erfrferferf
+aa
+0 rrrr
+
+
+```
+
+```log
+off=0 message begin
+off=5 len=32 span[url]="/chunked_w_unicorns_after_length"
+off=38 url complete
+off=48 len=4 span[header_field]="Host"
+off=53 header_field complete
+off=54 len=9 span[header_value]="localhost"
+off=65 header_value complete
+off=65 len=17 span[header_field]="Transfer-encoding"
+off=83 header_field complete
+off=84 len=7 span[header_value]="chunked"
+off=93 header_value complete
+off=95 headers complete method=3 v=1/1 flags=208 content_length=0
+off=96 error code=12 reason="Invalid character in chunk size"
+```
+
 ## Ignoring `pigeons`
 
 Requests cannot have invalid `Transfer-Encoding`. It is impossible to determine
@@ -598,5 +629,5 @@ off=37 header_field complete
 off=38 len=7 span[header_value]="chunked"
 off=47 header_value complete
 off=49 headers complete method=4 v=1/1 flags=208 content_length=0
-off=51 error code=2 reason="Invalid character in chunk parameters"
+off=50 error code=12 reason="Invalid character in chunk size"
 ```
diff --git a/test/response/transfer-encoding.md b/test/response/transfer-encoding.md
index 42fb588d..b606c660 100644
--- a/test/response/transfer-encoding.md
+++ b/test/response/transfer-encoding.md
@@ -33,19 +33,7 @@ off=61 header_field complete
 off=62 len=7 span[header_value]="chunked"
 off=71 header_value complete
 off=73 headers complete status=200 v=1/1 flags=208 content_length=0
-off=79 chunk header len=37
-off=79 len=35 span[body]="This is the data in the first chunk"
-off=114 len=1 span[body]=cr
-off=115 len=1 span[body]=lf
-off=118 chunk complete
-off=122 chunk header len=28
-off=122 len=26 span[body]="and this is the second one"
-off=148 len=1 span[body]=cr
-off=149 len=1 span[body]=lf
-off=152 chunk complete
-off=157 chunk header len=0
-off=159 chunk complete
-off=159 message complete
+off=75 error code=12 reason="Invalid character in chunk size"
 ```
 
 ### `chunked` before other transfer-encoding
@@ -148,4 +136,36 @@ off=75 len=1 span[body]=cr
 off=76 len=1 span[body]=lf
 off=77 len=1 span[body]=cr
 off=78 len=1 span[body]=lf
-```
\ No newline at end of file
+```
+
+### No semicolon before chunk parameters
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 200 OK
+Host: localhost
+Transfer-encoding: chunked
+
+2 erfrferferf
+aa
+0 rrrr
+
+
+```
+
+```log
+off=0 message begin
+off=13 len=2 span[status]="OK"
+off=17 status complete
+off=17 len=4 span[header_field]="Host"
+off=22 header_field complete
+off=23 len=9 span[header_value]="localhost"
+off=34 header_value complete
+off=34 len=17 span[header_field]="Transfer-encoding"
+off=52 header_field complete
+off=53 len=7 span[header_value]="chunked"
+off=62 header_value complete
+off=64 headers complete status=200 v=1/1 flags=208 content_length=0
+off=65 error code=12 reason="Invalid character in chunk size"
+```
+