diff --git a/include/ddc/discrete_vector.hpp b/include/ddc/discrete_vector.hpp
index 446f98f2c..d563032f9 100644
--- a/include/ddc/discrete_vector.hpp
+++ b/include/ddc/discrete_vector.hpp
@@ -381,7 +381,7 @@ class DiscreteVector : public detail::DiscreteVectorConversionOperators<Discrete
     template <std::size_t N = sizeof...(Tags), class = std::enable_if_t<N == 1>>
     KOKKOS_FUNCTION constexpr DiscreteVector& operator--()
     {
-        ++m_values[0];
+        --m_values[0];
         return *this;
     }
 
@@ -389,7 +389,7 @@ class DiscreteVector : public detail::DiscreteVectorConversionOperators<Discrete
     KOKKOS_FUNCTION constexpr DiscreteVector operator--(int)
     {
         DiscreteVector const tmp = *this;
-        ++m_values[0];
+        --m_values[0];
         return tmp;
     }
 
diff --git a/tests/discrete_vector.cpp b/tests/discrete_vector.cpp
index 99e1137c8..a4f95c715 100644
--- a/tests/discrete_vector.cpp
+++ b/tests/discrete_vector.cpp
@@ -48,6 +48,42 @@ TEST(DiscreteVectorXYZTest, ConstructorFromDiscreteVectors)
     EXPECT_EQ(ixyz.get<DDimZ>(), dv_z);
 }
 
+TEST(DiscreteVectorXTest, PreIncrement)
+{
+    DVectX const ix0(3);
+    DVectX ix1(ix0);
+    DVectX const ix2 = ++ix1;
+    EXPECT_EQ(ix1, ix0 + 1);
+    EXPECT_EQ(ix2, ix0 + 1);
+}
+
+TEST(DiscreteVectorXTest, PostIncrement)
+{
+    DVectX const ix0(3);
+    DVectX ix1(ix0);
+    DVectX const ix2 = ix1++;
+    EXPECT_EQ(ix1, ix0 + 1);
+    EXPECT_EQ(ix2, ix0);
+}
+
+TEST(DiscreteVectorXTest, PreDecrement)
+{
+    DVectX const ix0(3);
+    DVectX ix1(ix0);
+    DVectX const ix2 = --ix1;
+    EXPECT_EQ(ix1, ix0 - 1);
+    EXPECT_EQ(ix2, ix0 - 1);
+}
+
+TEST(DiscreteVectorXTest, PostDecrement)
+{
+    DVectX const ix0(3);
+    DVectX ix1(ix0);
+    DVectX const ix2 = ix1--;
+    EXPECT_EQ(ix1, ix0 - 1);
+    EXPECT_EQ(ix2, ix0);
+}
+
 TEST(DiscreteVectorTest, ExternalBinaryOperatorPlus)
 {
     std::size_t const dv_x = 7;