diff --git a/WEGA/contrib/lcc/h/sys/sysmacros.h b/WEGA/contrib/lcc/h/sys/sysmacros.h
new file mode 100644
index 0000000..349bd94
--- /dev/null
+++ b/WEGA/contrib/lcc/h/sys/sysmacros.h
@@ -0,0 +1,34 @@
+/*
+ * Some macros for units conversion
+ */
+
+	/* Core clicks (256 bytes) to PDP-11 segments and vice versa */
+# define ctos(x)	(((x)+31)>>5)
+# define stoc(x) 	((x)<<5)
+
+	/* Core clicks (256 bytes) to disk blocks */
+# define ctod(x)	(((x)+1)>>1)
+
+	/* inumber to disk address */
+# define itod(x)	(daddr_t)((((unsigned)(x)+15)>>3))
+
+	/* inumber to disk offset */
+# define itoo(x)	(int)(((x)+15)&07)
+
+	/* clicks to bytes */
+# define ctob(x)	((x)<<8)
+
+	/* bytes to clicks */
+# define btoc(x) 	((unsigned)(((long)((unsigned)x) + 255L)>>8))
+
+	/* long bytes to clicks */
+# define lbtoc(x)	((unsigned)(((x)+255L)>>8))
+
+	/* major part of a device */
+# define major(x)	(int)(((unsigned)(x)>>8))
+
+	/* minor part of a device */
+# define minor(x)	(int)((x)&0377)
+
+	/* make a device number */
+# define makedev(x,y)	(dev_t)((x)<<8 | (y))