diff --git a/vm/in/ARITH b/vm/in/ARITH
index 8afbbfd..1837ef4 100644
--- a/vm/in/ARITH
+++ b/vm/in/ARITH
@@ -102,12 +102,15 @@ xadd m r
 #
 sub r rim
 sub r r ri
+sub r i r
 
 sub m ri
 sub m r ri
+sub m i r
 
 subf r ri
 subf r r ri
+subf r i r
 
 
 #
@@ -157,6 +160,7 @@ mulhi r r ri
 #
 div r ri
 div r r ri
+div r i r
 
 #
 # Arithmetical unsigned modulo operation (REM)
@@ -167,4 +171,5 @@ div r r ri
 #
 rem r ri
 rem r r ri
+rem r i r