diff --git a/autotests/alkvaluetest.h b/autotests/alkvaluetest.h
--- a/autotests/alkvaluetest.h
+++ b/autotests/alkvaluetest.h
@@ -47,6 +47,7 @@
     void subtraction();
     void multiplication();
     void division();
+    void modulo();
     void unaryMinus();
     void abs();
     void precision();
diff --git a/autotests/alkvaluetest.cpp b/autotests/alkvaluetest.cpp
--- a/autotests/alkvaluetest.cpp
+++ b/autotests/alkvaluetest.cpp
@@ -404,6 +404,17 @@
     QCOMPARE(m0, AlkValue(-5));
 }
 
+void AlkValueTest::modulo()
+{
+    AlkValue m0(1025000), m1;
+    m1 = m0 % 97;
+    QCOMPARE(m1.abs(), AlkValue(1));
+
+    m0 = 1024999;
+    m1 = m0 % 97;
+    QCOMPARE(m1.abs(), AlkValue(0));
+}
+
 void AlkValueTest::unaryMinus()
 {
     // AlkValue operator-() const;
diff --git a/src/alkvalue.h.in b/src/alkvalue.h.in
--- a/src/alkvalue.h.in
+++ b/src/alkvalue.h.in
@@ -197,6 +197,7 @@
   AlkValue operator-(const AlkValue &minuend) const;
   AlkValue operator*(const AlkValue &factor) const;
   AlkValue operator/(const AlkValue &divisor) const;
+  AlkValue operator%(int operand) const;
 
   AlkValue operator*(int factor) const;
 
diff --git a/src/alkvalue.cpp b/src/alkvalue.cpp
--- a/src/alkvalue.cpp
+++ b/src/alkvalue.cpp
@@ -444,6 +444,14 @@
     return result;
 }
 
+AlkValue AlkValue::operator%(int operand) const
+{
+    mpz_class num(mpq_numref(d->m_val.get_mpq_t()));
+    AlkValue result;
+    result.d->m_val = num % operand;
+    return result;
+}
+
 AlkValue AlkValue::operator*(int factor) const
 {
     AlkValue result;