diff --git a/ortools/constraint_solver/assignment.cc b/ortools/constraint_solver/assignment.cc
index b77f7dbc50..b056a48d6a 100644
--- a/ortools/constraint_solver/assignment.cc
+++ b/ortools/constraint_solver/assignment.cc
@@ -1054,7 +1054,7 @@ class RestoreAssignment : public DecisionBuilder {
 
   ~RestoreAssignment() override {}
 
-  Decision* Next(Solver* const solver) override {
+  Decision* Next(Solver* const /*solver*/) override {
     assignment_->Restore();
     return nullptr;
   }
@@ -1071,7 +1071,7 @@ class StoreAssignment : public DecisionBuilder {
 
   ~StoreAssignment() override {}
 
-  Decision* Next(Solver* const solver) override {
+  Decision* Next(Solver* const /*solver*/) override {
     assignment_->Store();
     return nullptr;
   }
diff --git a/ortools/constraint_solver/python/pywrapcp_util.h b/ortools/constraint_solver/python/pywrapcp_util.h
index c792581396..46d64b4ec2 100644
--- a/ortools/constraint_solver/python/pywrapcp_util.h
+++ b/ortools/constraint_solver/python/pywrapcp_util.h
@@ -92,5 +92,4 @@ class CallPyDecisionBuilder : public operations_research::DecisionBuilder {
   PyObject* str_func_;
 };
 
-
 #endif  // OR_TOOLS_CONSTRAINT_SOLVER_PYTHON_PYWRAPCP_UTIL_H_
diff --git a/ortools/constraint_solver/samples/vrp_global_span.cc b/ortools/constraint_solver/samples/vrp_global_span.cc
index 6345672e69..4eba3164e0 100644
--- a/ortools/constraint_solver/samples/vrp_global_span.cc
+++ b/ortools/constraint_solver/samples/vrp_global_span.cc
@@ -13,6 +13,7 @@
 
 // [START program]
 // [START import]
+#include <algorithm>
 #include <cstdint>
 #include <vector>
 
diff --git a/ortools/constraint_solver/samples/vrp_initial_routes.cc b/ortools/constraint_solver/samples/vrp_initial_routes.cc
index be74d6f89a..7781482f14 100644
--- a/ortools/constraint_solver/samples/vrp_initial_routes.cc
+++ b/ortools/constraint_solver/samples/vrp_initial_routes.cc
@@ -13,6 +13,7 @@
 
 // [START program]
 // [START import]
+#include <algorithm>
 #include <cstdint>
 #include <vector>
 
diff --git a/ortools/constraint_solver/samples/vrp_starts_ends.cc b/ortools/constraint_solver/samples/vrp_starts_ends.cc
index a337c4b8fb..88c7aaccbe 100644
--- a/ortools/constraint_solver/samples/vrp_starts_ends.cc
+++ b/ortools/constraint_solver/samples/vrp_starts_ends.cc
@@ -13,6 +13,7 @@
 
 // [START program]
 // [START import]
+#include <algorithm>
 #include <cstdint>
 #include <vector>
 
diff --git a/ortools/constraint_solver/samples/vrp_with_time_limit.cc b/ortools/constraint_solver/samples/vrp_with_time_limit.cc
index f5a9f8788f..d9fa401d23 100644
--- a/ortools/constraint_solver/samples/vrp_with_time_limit.cc
+++ b/ortools/constraint_solver/samples/vrp_with_time_limit.cc
@@ -13,6 +13,7 @@
 
 // [START program]
 // [START import]
+#include <algorithm>
 #include <cstdint>
 #include <vector>