diff --git a/CHANGELOG.md b/CHANGELOG.md
index aae16525..10d9b589 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@ Version 56:
 
 * Add provisional IANA header field names
 * Add string_view_body
+* Call on_chunk when the extension is empty
 
 --------------------------------------------------------------------------------
 
diff --git a/include/beast/http/impl/basic_parser.ipp b/include/beast/http/impl/basic_parser.ipp
index 24408767..e37b824f 100644
--- a/include/beast/http/impl/basic_parser.ipp
+++ b/include/beast/http/impl/basic_parser.ipp
@@ -567,6 +567,9 @@ parse_chunk_header(char const*& p0,
                 ec = error::bad_chunk;
                 return;
             }
+            impl().on_chunk(v, {}, ec);
+            if(ec)
+                return;
             len_ = v;
             skip_ = 2;
             p0 = eol;