1 files changed, 1 insertions, 1 deletions
diff --git a/bird-machine-macros/src/dfa.rs b/bird-machine-macros/src/dfa.rs
index 0aec059..6f5e6f7 100644
--- a/bird-machine-macros/src/dfa.rs
+++ b/bird-machine-macros/src/dfa.rs
@@ -49,7 +49,7 @@ impl From<NFA> for LabeledDFA<BTreeSet<usize>> {
             }
 
             for states in next_table.values() {
-                if !transition_table.contains_key(states) {
+                if !transition_table.contains_key(states) && !queue.contains(states) {
                     queue.push_back(states.clone());
                 }
             }