diff --git a/src/proto_uxst.c b/src/proto_uxst.c
index 0edc2aff2..0eaea3c40 100644
--- a/src/proto_uxst.c
+++ b/src/proto_uxst.c
@@ -805,7 +805,7 @@ struct task *uxst_process_session(struct task *t)
 		}
 		s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
 		flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-		if (s->req->flags != flags)
+		if ((s->req->flags ^ flags) & BF_MASK_STATIC)
 			resync = 1;
 	}
 
@@ -891,7 +891,7 @@ struct task *uxst_process_session(struct task *t)
 		}
 		s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
 		flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-		if (s->rep->flags != flags)
+		if ((s->rep->flags ^ flags) & BF_MASK_STATIC)
 			resync = 1;
 	}
 	else if ((s->rep->flags & BF_MASK_ANALYSER) ||
@@ -904,7 +904,7 @@ struct task *uxst_process_session(struct task *t)
 		}
 		s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
 		flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-		if (s->rep->flags != flags)
+		if ((s->rep->flags ^ flags) & BF_MASK_STATIC)
 			resync = 1;
 	}
 
diff --git a/src/session.c b/src/session.c
index 6bb6a4537..9c06065f5 100644
--- a/src/session.c
+++ b/src/session.c
@@ -778,7 +778,7 @@ resync_stream_interface:
 
 		s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
 		flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-		if (s->req->flags != flags)
+		if ((s->req->flags ^ flags) & BF_MASK_STATIC)
 			resync = 1;
 	}
 
@@ -925,7 +925,7 @@ resync_stream_interface:
 		}
 		s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
 		flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-		if (s->rep->flags != flags)
+		if ((s->rep->flags ^ flags) & BF_MASK_STATIC)
 			resync = 1;
 	}
 	else if ((s->rep->flags & BF_MASK_ANALYSER) ||
@@ -956,7 +956,7 @@ resync_stream_interface:
 
 		s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
 		flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-		if (s->rep->flags != flags)
+		if ((s->rep->flags ^ flags) & BF_MASK_STATIC)
 			resync = 1;
 	}