diff --git a/NEWS b/NEWS
index 7ac8f805..6a9d9edd 100644
--- a/NEWS
+++ b/NEWS
@@ -24,6 +24,7 @@ NEWS
   * Use FD_CLOEXEC if possible (fixes #1821)
   * Optimized buffer usage in mod_proxy (fixes #1850)
   * Fix uninitialized value in time struct after strptime
+  * Do not pass Proxy-Connection: header from client to backend http server in mod_proxy (#1877)
 
 - 1.4.20 - 2008-09-30
 
diff --git a/src/mod_proxy.c b/src/mod_proxy.c
index 85a3581b..92549e2f 100644
--- a/src/mod_proxy.c
+++ b/src/mod_proxy.c
@@ -454,6 +454,7 @@ static int proxy_create_env(server *srv, handler_ctx *hctx) {
 
 		if (ds->value->used && ds->key->used) {
 			if (buffer_is_equal_string(ds->key, CONST_STR_LEN("Connection"))) continue;
+			if (buffer_is_equal_string(ds->key, CONST_STR_LEN("Proxy-Connection"))) continue;
 
 			buffer_append_string_buffer(b, ds->key);
 			buffer_append_string_len(b, CONST_STR_LEN(": "));