diff --git a/src/compiler/parse_table.cc b/src/compiler/parse_table.cc
index b63d472b..ef0e235d 100644
--- a/src/compiler/parse_table.cc
+++ b/src/compiler/parse_table.cc
@@ -206,7 +206,7 @@ bool ParseTable::merge_state(size_t i, size_t j) {
 
     const auto &other_entry = other.entries.find(symbol);
     if (other_entry == other.entries.end()) {
-      if (mergeable_symbols.count(symbol) == 0)
+      if (mergeable_symbols.count(symbol) == 0 && !symbol.is_built_in() && symbol.is_token)
         return false;
       if (actions.back().type != ParseActionTypeReduce)
         return false;
@@ -224,7 +224,7 @@ bool ParseTable::merge_state(size_t i, size_t j) {
     const vector<ParseAction> &actions = entry.second.actions;
 
     if (!state.entries.count(symbol)) {
-      if (mergeable_symbols.count(symbol) == 0)
+      if (mergeable_symbols.count(symbol) == 0 && !symbol.is_built_in() && symbol.is_token)
         return false;
       if (actions.back().type != ParseActionTypeReduce)
         return false;