diff --git a/rest_framework/views.py b/rest_framework/views.py
index 8ec5f14ab..cc2b386b2 100644
--- a/rest_framework/views.py
+++ b/rest_framework/views.py
@@ -183,7 +183,11 @@ class APIView(View):
         """
         authenticators = self.get_authenticators()
         if authenticators:
-            return authenticators[0].authenticate_header(request)
+            for authenticator in authenticators:
+                authenticate_header = authenticator.authenticate_header(request)
+                    if authenticate_header:
+                        return authenticate_header
+        return None
 
     def get_parser_context(self, http_request):
         """