diff --git a/src/instruction.h b/src/instruction.h
index 29cf621..9e2c762 100644
--- a/src/instruction.h
+++ b/src/instruction.h
@@ -53,5 +53,6 @@ void stack_push(rk65c02emu_t *, uint8_t);
 uint8_t stack_pop(rk65c02emu_t *);
 void program_counter_increment(rk65c02emu_t *, instrdef_t *);
 bool instruction_modify_pc(instrdef_t *);
+void program_counter_branch(rk65c02emu_t *, int8_t);
 
 #endif /* _INSTRUCTION_H_ */