diff --git a/pic16bit/unistd.h b/pic16bit/unistd.h
new file mode 100644
index 0000000000000000000000000000000000000000..5ed9cb41012069a28df137db156e9109ea6a0c62
--- /dev/null
+++ b/pic16bit/unistd.h
@@ -0,0 +1,3 @@
+// XC16 compiler doesn't seem to have unistd.h file
+
+#define SEEK_CUR 1