diff --git a/lib/headers.c b/lib/headers.c
index 154623737a..d1e0ed7544 100644
--- a/lib/headers.c
+++ b/lib/headers.c
@@ -74,8 +74,8 @@ CURLHcode curl_easy_header(CURL *easy,
   struct Curl_header_store *hs = NULL;
   struct Curl_header_store *pick = NULL;
   if(!name || !hout || !data ||
-     (type > (CURLH_HEADER|CURLH_TRAILER|CURLH_CONNECT|CURLH_1XX)) ||
-     !type || (request < -1))
+     (type > (CURLH_HEADER|CURLH_TRAILER|CURLH_CONNECT|CURLH_1XX|
+              CURLH_PSEUDO)) || !type || (request < -1))
     return CURLHE_BAD_ARGUMENT;
   if(!Curl_llist_count(&data->state.httphdrs))
     return CURLHE_NOHEADERS; /* no headers available */