diff --git a/include/fintamath/core/IMathObject.hpp b/include/fintamath/core/IMathObject.hpp
index 1dd87f4b3..7d0a21ad0 100644
--- a/include/fintamath/core/IMathObject.hpp
+++ b/include/fintamath/core/IMathObject.hpp
@@ -36,6 +36,10 @@ class IMathObject {
   virtual MathObjectClass getClass() const noexcept = 0;
 
   friend bool operator==(const IMathObject &lhs, const IMathObject &rhs) {
+    if (&lhs == &rhs) {
+      return true;
+    }
+
     return lhs.equalsAbstract(rhs);
   }
 
diff --git a/include/fintamath/core/IMathObjectCRTP.hpp b/include/fintamath/core/IMathObjectCRTP.hpp
index 6e1656f9f..5e65dd60f 100644
--- a/include/fintamath/core/IMathObjectCRTP.hpp
+++ b/include/fintamath/core/IMathObjectCRTP.hpp
@@ -19,6 +19,10 @@ class IMathObjectCRTP_ : public IMathObject {
   }
 
   bool operator==(const I_MATH_OBJECT_CRTP &rhs) const {
+    if (this == &rhs) {
+      return true;
+    }
+
     return equals(cast<Derived>(rhs));
   }