diff --git a/src/main/res/raw/ops.forth b/src/main/res/raw/ops.forth
index 5ca91cb..fc54460 100644
--- a/src/main/res/raw/ops.forth
+++ b/src/main/res/raw/ops.forth
@@ -7,6 +7,8 @@
 : percent ( n n -- n ) * 100.0 / ;
 : odd?  2 /mod drop 0 != ;
 : even? 2 /mod drop 0  = ;
+: mod /mod drop ;
+: div /mod nip ;
 ( finance )
 : cin1 ( b i n -- t ) swap 100 / 1+ swap pow * ;
 : cin2 ( base interest years monthly-contribution -- .. )
diff --git a/src/test/java/com/vectron/fcl/FclTest.java b/src/test/java/com/vectron/fcl/FclTest.java
index fab21c6..fa4a707 100644
--- a/src/test/java/com/vectron/fcl/FclTest.java
+++ b/src/test/java/com/vectron/fcl/FclTest.java
@@ -89,6 +89,10 @@ public class FclTest {
         assertEquals(1157.625, evalPop("10.5 3 pow").doubleValue(), 0.01);
         assertEquals(asList(1l, 3l), evalGetStack("10 3 /mod"));
         assertEquals(asList(0l, 2l), evalGetStack("10 5 /mod"));
+        assertEquals(1, evalPop("10 3 mod").intValue());
+        assertEquals(3, evalPop("10 3 div").intValue());
+        assertEquals(0, evalPop("10 5 mod").intValue());
+        assertEquals(2, evalPop("10 5 div").intValue());
         assertEquals(7, evalPop("7 round").longValue());
         assertEquals(8, evalPop("7.5 round").longValue());
         assertEquals(7, evalPop("7.4 round").longValue());