diff --git a/include/types/proto_http.h b/include/types/proto_http.h
index ae4e1eb..3d38d57 100644
--- a/include/types/proto_http.h
+++ b/include/types/proto_http.h
@@ -98,6 +98,7 @@
 #define TX_HDR_CONN_PRS	0x08000000	/* "connection" header already parsed (req or res), results below */
 #define TX_HDR_CONN_CLO	0x10000000	/* "Connection: close" was present at least once */
 #define TX_HDR_CONN_KAL	0x20000000	/* "Connection: keep-alive" was present at least once */
+#define TX_USE_PX_CONN	0x40000000	/* Use "Proxy-Connection" instead of "Connection" */
 
 
 /* The HTTP parser is more complex than it looks like, because we have to
diff --git a/include/types/proxy.h b/include/types/proxy.h
index c4fb505..0571f17 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -135,6 +135,7 @@
 #define PR_O2_AS_M_ANY	0x00010000      /* mask covering all PR_O2_AS_M_* values */
 
 #define PR_O2_MYSQL_CHK 0x00020000      /* use MYSQL check for server health */
+#define PR_O2_USE_PXHDR 0x00040000      /* use Proxy-Connection for proxy requests */
 /* end of proxy->options2 */
 
 /* bits for sticking rules */