diff --git a/src/lib/dhcpsrv/memfile_lease_mgr.h b/src/lib/dhcpsrv/memfile_lease_mgr.h
index 749d358296..73afd45e87 100644
--- a/src/lib/dhcpsrv/memfile_lease_mgr.h
+++ b/src/lib/dhcpsrv/memfile_lease_mgr.h
@@ -1246,8 +1246,8 @@ public:
     /// Lease::TYPE_V4.
     ///
     /// @return number of leases
-    virtual size_t getClassLeaseCount(const ClientClass& client_class,
-                                      const Lease::Type& ltype = Lease::TYPE_V4) const override;
+    size_t getClassLeaseCount(const ClientClass& client_class,
+                              const Lease::Type& ltype = Lease::TYPE_V4) const override;
 
     /// @brief Recount the leases per class for V4 leases.
     ///
diff --git a/src/lib/dhcpsrv/mysql_lease_mgr.h b/src/lib/dhcpsrv/mysql_lease_mgr.h
index 046512d3ac..7392c9c3ba 100644
--- a/src/lib/dhcpsrv/mysql_lease_mgr.h
+++ b/src/lib/dhcpsrv/mysql_lease_mgr.h
@@ -985,8 +985,8 @@ private:
     /// Lease::TYPE_V4.
     ///
     /// @return number of leases
-    virtual size_t getClassLeaseCount(const ClientClass& client_class,
-                                      const Lease::Type& ltype = Lease::TYPE_V4) const override;
+    size_t getClassLeaseCount(const ClientClass& client_class,
+                              const Lease::Type& ltype = Lease::TYPE_V4) const override;
 
     /// @brief Recount the leases per class for V4 leases.
     void recountClassLeases4() override;
diff --git a/src/lib/dhcpsrv/pgsql_lease_mgr.h b/src/lib/dhcpsrv/pgsql_lease_mgr.h
index fc22207e64..50709f0ebc 100644
--- a/src/lib/dhcpsrv/pgsql_lease_mgr.h
+++ b/src/lib/dhcpsrv/pgsql_lease_mgr.h
@@ -959,8 +959,8 @@ private:
     /// Lease::TYPE_V4.
     ///
     /// @return number of leases
-    virtual size_t getClassLeaseCount(const ClientClass& client_class,
-                                      const Lease::Type& ltype = Lease::TYPE_V4) const override;
+    size_t getClassLeaseCount(const ClientClass& client_class,
+                              const Lease::Type& ltype = Lease::TYPE_V4) const override;
 
     /// @brief Recount the leases per class for V4 leases.
     void recountClassLeases4() override;
diff --git a/src/lib/dhcpsrv/tests/lease_mgr_unittest.cc b/src/lib/dhcpsrv/tests/lease_mgr_unittest.cc
index 6475de001f..57197a3f33 100644
--- a/src/lib/dhcpsrv/tests/lease_mgr_unittest.cc
+++ b/src/lib/dhcpsrv/tests/lease_mgr_unittest.cc
@@ -374,8 +374,8 @@ public:
     /// Lease::TYPE_V4.
     ///
     /// @return number of leases
-    virtual size_t getClassLeaseCount(const ClientClass& client_class,
-                                      const Lease::Type& ltype = Lease::TYPE_V4) const override {
+    size_t getClassLeaseCount(const ClientClass& /* client_class */,
+                              const Lease::Type& /* ltype = Lease::TYPE_V4 */) const override {
         isc_throw(NotImplemented, "ConcreteLeaseMgr::getClassLeaseCount() not implemented");
     }