diff --git a/Headers/Assembler/SagittariusAssembler.h b/Headers/Assembler/SagittariusAssembler.h
index 25a1100..7892055 100644
--- a/Headers/Assembler/SagittariusAssembler.h
+++ b/Headers/Assembler/SagittariusAssembler.h
@@ -80,6 +80,7 @@ typedef struct Sag_IntermediateProgram{
     uint64_t Consts_count;
 } Sag_IntermediateProgram;
 bool Sag_NextWord(FILE* f, Sag_Str* out);
+bool Sag_MatchStr(Sag_Str* str, char** match_list, uint64_t match_count, uint64_t* out_index);
 bool Sag_Scan(FILE* f, Sag_IntermediateProgram* out);
 bool Sag_Combine(Sag_IntermediateProgram* L, Sag_IntermediateProgram* R, Sag_IntermediateProgram* out);
 bool Sag_Finalize(Sag_IntermediateProgram* intermediate, SagittariusProgram* out);