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PiperOrigin-RevId: 910469681

tools/grammar_domain_code_generator.cc

diff --git a/tools/grammar_domain_code_generator.cc b/tools/grammar_domain_code_generator.cc
index 0e0377e..bfd2bb9 100644
--- a/tools/grammar_domain_code_generator.cc
+++ b/tools/grammar_domain_code_generator.cc
@@ -21,7 +21,9 @@
 //   --output_header_file=json_grammar.h
 
 #include <filesystem>
+#include <fstream>
 #include <optional>
+#include <sstream>
 #include <string>
 #include <vector>