diff --git a/src/syseng/ntsddt.n78h b/src/syseng/ntsddt.n79h
similarity index 99%
rename from src/syseng/ntsddt.n78h
rename to src/syseng/ntsddt.n79h
index fe42b750..fb519efb 100644
--- a/src/syseng/ntsddt.n78h
+++ b/src/syseng/ntsddt.n79h
@@ -28,6 +28,16 @@ B=S
 C=W
 D=T
 
+PI==4
+PTR==100
+PTP==104
+TTY==120
+LPT==124
+DIS==130
+DC==200
+UTC==210
+UTS==241
+
 NBP==10	;NUMBER OF BREAK POINTS
 PRS==4
 LPDL==50	;MAX LENGTH PUSH DOWN LIST