diff --git a/src/composer.jl b/src/composer.jl
index 3e9de4b..1525a5c 100644
--- a/src/composer.jl
+++ b/src/composer.jl
@@ -130,7 +130,9 @@ function _compose_sequence_node(start_event::SequenceStartEvent, composer, ancho
         composer.anchors[anchor] = node
     end
 
-    while (event = peek(composer.input)) !== nothing
+    while true
+        event = peek(composer.input)
+        event === nothing && break
         __compose_sequence_node(event, composer, node) || break
     end