diff --git a/src/compiler/build_tables/build_parse_table.cc b/src/compiler/build_tables/build_parse_table.cc
index 50c84af7..d1d90455 100644
--- a/src/compiler/build_tables/build_parse_table.cc
+++ b/src/compiler/build_tables/build_parse_table.cc
@@ -394,7 +394,8 @@ class ParseTableBuilder {
       } else {
         ParseState &state = *iter;
         state.each_referenced_state([&new_state_ids](ParseStateId *state_index) {
-          *state_index = new_state_ids[*state_index];
+          if (*state_index != (ParseStateId)(-1))
+            *state_index = new_state_ids[*state_index];
         });
         ++iter;
       }