diff --git a/src/stream_sock.c b/src/stream_sock.c
index 64e3530..3624702 100644
--- a/src/stream_sock.c
+++ b/src/stream_sock.c
@@ -34,6 +34,7 @@
 #include <proto/freq_ctr.h>
 #include <proto/log.h>
 #include <proto/pipe.h>
+#include <proto/protocols.h>
 #include <proto/stream_sock.h>
 #include <proto/task.h>