diff --git a/include/drivers/io_semihosting.h b/include/drivers/io_semihosting.h
index 7dc632d..eab290a 100644
--- a/include/drivers/io_semihosting.h
+++ b/include/drivers/io_semihosting.h
@@ -31,6 +31,8 @@
 #ifndef __IO_SH_H__
 #define __IO_SH_H__
 
+struct io_dev_connector;
+
 int register_io_dev_sh(struct io_dev_connector **dev_con);
 
 #endif /* __IO_SH_H__ */