diff --git a/src/protocol/parser/pass_tokenizer.rs b/src/protocol/parser/pass_tokenizer.rs
index 23537ca2aea79b2119ac7ad10eddca89a7ce271c..a1e29aabfa77e1c29d0fd3b0d9711ba67a30c6ec 100644
--- a/src/protocol/parser/pass_tokenizer.rs
+++ b/src/protocol/parser/pass_tokenizer.rs
@@ -355,7 +355,12 @@ impl PassTokenizer {
             token_kind = TokenKind::Question;
         } else if first_char == b'@' {
             source.consume();
-            token_kind = TokenKind::At;
+            if let Some(b'=') = source.next() {
+                source.consume();
+                token_kind = TokenKind::AtEquals;
+            } else {
+                token_kind = TokenKind::At;
+            }
         } else if first_char == b'[' {
             source.consume();
             token_kind = TokenKind::OpenSquare;