diff --git a/http_parser/pyparser.py b/http_parser/pyparser.py
index 835ca34..2775076 100644
--- a/http_parser/pyparser.py
+++ b/http_parser/pyparser.py
@@ -323,6 +323,8 @@ def _parse_request_line(self, line):
 
     def _parse_headers(self, data):
         idx = data.find(b("\r\n\r\n"))
+        if idx < 0:
+            idx = data.find(b("\n\n"))
         if idx < 0: # we don't have all headers
             return False