diff --git a/tools/lkl/include/lkl.h b/tools/lkl/include/lkl.h
index a20651472a9471..ae7396276e1bf4 100644
--- a/tools/lkl/include/lkl.h
+++ b/tools/lkl/include/lkl.h
@@ -428,7 +428,7 @@ struct lkl_netdev *lkl_netdev_macvtap_create(const char *path, int offload);
  * If you run the program from shell script, make sure you ignore SIGTSTP by
  * "trap '' TSTP" in the shell script.
  */
-void lkl_register_dbg_handler();
+void lkl_register_dbg_handler(void);
 
 /**
  * lkl_add_neighbor - add a permanent arp entry
diff --git a/tools/lkl/lib/fs.c b/tools/lkl/lib/fs.c
index e5ef086972a13e..b27acee8cb77bc 100644
--- a/tools/lkl/lib/fs.c
+++ b/tools/lkl/lib/fs.c
@@ -80,6 +80,7 @@ int lkl_encode_dev_from_sysfs(const char *sysfs_path, uint32_t *pdevid)
 	long fd;
 	int major, minor;
 	char buf[16] = { 0, };
+	char *bufptr;
 
 	fd = lkl_sys_open(sysfs_path, LKL_O_RDONLY, 0);
 	if (fd < 0)
@@ -94,11 +95,16 @@ int lkl_encode_dev_from_sysfs(const char *sysfs_path, uint32_t *pdevid)
 		goto out_close;
 	}
 
-	ret = sscanf(buf, "%d:%d", &major, &minor);
-	if (ret != 2) {
+	bufptr = strchr(buf, ':');
+	if (bufptr == NULL) {
 		ret = -LKL_EINVAL;
 		goto out_close;
 	}
+	bufptr[0] = '\0';
+	bufptr++;
+
+	major = atoi(buf);
+	minor = atoi(bufptr);
 
 	*pdevid = new_encode_dev(major, minor);
 	ret = 0;
@@ -356,7 +362,7 @@ struct lkl_dir *lkl_fdopendir(int fd, int *err)
 
 void lkl_rewinddir(struct lkl_dir *dir)
 {
-	lkl_sys_lseek(dir->fd, 0, SEEK_SET);
+	lkl_sys_lseek(dir->fd, 0, LKL_SEEK_SET);
 	dir->len = 0;
 	dir->pos = NULL;
 }