diff --git a/src/applet.c b/src/applet.c
index 6774e1a88..def5c2aff 100644
--- a/src/applet.c
+++ b/src/applet.c
@@ -269,7 +269,7 @@ struct appctx *appctx_new_on(struct applet *applet, struct sedesc *sedesc, int t
 
 	if (applet->rcv_buf != NULL && applet->snd_buf != NULL) {
 		appctx->t->process = task_process_applet;
-		appctx->flags |= APPCTX_FL_INOUT_BUFS;
+		applet_fl_set(appctx, APPCTX_FL_INOUT_BUFS);
 	}
 	else
 		appctx->t->process = task_run_applet;
diff --git a/src/cache.c b/src/cache.c
index 6cbfe7a82..2c11db99d 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -1784,7 +1784,7 @@ static void http_cache_io_handler(struct appctx *appctx)
 		goto exit;
 
 	if (!appctx_get_buf(appctx, &appctx->outbuf)) {
-		appctx->flags |= APPCTX_FL_OUTBLK_ALLOC;
+		applet_fl_set(appctx, APPCTX_FL_OUTBLK_ALLOC);
 		goto exit;
 	}
 
@@ -1842,7 +1842,7 @@ static void http_cache_io_handler(struct appctx *appctx)
 		if (len) {
 			ret = htx_cache_dump_msg(appctx, res_htx, len, HTX_BLK_UNUSED);
 			if (ret < len) {
-				appctx->flags |= APPCTX_FL_OUTBLK_FULL;
+				applet_fl_set(appctx, APPCTX_FL_OUTBLK_FULL);
 				goto out;
 			}
 		}
diff --git a/src/stats.c b/src/stats.c
index a6541a264..39e232591 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -335,7 +335,7 @@ int stats_is_full(struct appctx *appctx, struct buffer *buf, struct htx *htx)
 {
 	if (htx) {
 		if (htx_almost_full(htx)) {
-			appctx->flags |= APPCTX_FL_OUTBLK_FULL;
+			applet_fl_set(appctx, APPCTX_FL_OUTBLK_FULL);
 			goto full;
 		}
 	}
@@ -4503,7 +4503,7 @@ static void http_stats_io_handler(struct appctx *appctx)
 		goto out;
 
 	if (!appctx_get_buf(appctx, &appctx->outbuf)) {
-		appctx->flags |= APPCTX_FL_OUTBLK_ALLOC;
+		applet_fl_set(appctx, APPCTX_FL_OUTBLK_ALLOC);
 		goto out;
 	}
 
@@ -4557,7 +4557,7 @@ static void http_stats_io_handler(struct appctx *appctx)
 		 */
 		if (htx_is_empty(res_htx)) {
 			if (!htx_add_endof(res_htx, HTX_BLK_EOT)) {
-				appctx->flags |= APPCTX_FL_OUTBLK_FULL;
+				applet_fl_set(appctx, APPCTX_FL_OUTBLK_FULL);
 				goto out;
 			}
 		}