diff --git a/src/instruction.h b/src/instruction.h
index c58182c..9b380cc 100644
--- a/src/instruction.h
+++ b/src/instruction.h
@@ -65,6 +65,8 @@ void program_counter_branch(rk65c02emu_t *, int8_t);
 bool assemble_single_buf_implied(uint8_t **, uint8_t *, const char *);
 bool assemble_single_buf(uint8_t **, uint8_t *, const char *, addressing_t, uint8_t, uint8_t);
 
-assembler_t assemble_init(bus_t *b, uint16_t pc);
+assembler_t assemble_init(bus_t *, uint16_t);
+bool assemble_single(assembler_t *, const char *, addressing_t, uint8_t, uint8_t);
+bool assemble_single_buf_implied(uint8_t **, uint8_t *, const char *);
 
 #endif /* _INSTRUCTION_H_ */