diff --git a/sys/compat/linuxkpi/common/src/linux_seq_file.c b/sys/compat/linuxkpi/common/src/linux_seq_file.c
--- a/sys/compat/linuxkpi/common/src/linux_seq_file.c
+++ b/sys/compat/linuxkpi/common/src/linux_seq_file.c
@@ -67,7 +67,7 @@
 		return (-EINVAL);
 
 	size = min(rc - *ppos, size);
-	rc = strscpy(ubuf, sbuf_data(sbuf) + *ppos, size);
+	rc = strscpy(ubuf, sbuf_data(sbuf) + *ppos, size + 1);
 
 	/* add 1 for null terminator */
 	if (rc > 0)