diff --git a/pdfminer/psparser.py b/pdfminer/psparser.py
index 83d15140..cf919d39 100755
--- a/pdfminer/psparser.py
+++ b/pdfminer/psparser.py
@@ -317,7 +317,7 @@ def _parse_main(self, s: bytes, i: int) -> int:
             self._curtoken = c
             self._parse1 = self._parse_float
             return j + 1
-        elif c.isalpha():
+        elif c.isalpha() or c == b"@":
             self._curtoken = c
             self._parse1 = self._parse_keyword
             return j + 1