diff --git a/ortools/sat/BUILD.bazel b/ortools/sat/BUILD.bazel
index 64344b7953..eeec8bcd7e 100644
--- a/ortools/sat/BUILD.bazel
+++ b/ortools/sat/BUILD.bazel
@@ -1361,6 +1361,7 @@ cc_library(
         "@com_google_absl//absl/log:check",
         "@com_google_absl//absl/meta:type_traits",
         "@com_google_absl//absl/types:span",
+        "@com_google_protobuf//:protobuf",
     ],
 )
 
diff --git a/ortools/sat/integer.h b/ortools/sat/integer.h
index cadea7edd5..a4629893bd 100644
--- a/ortools/sat/integer.h
+++ b/ortools/sat/integer.h
@@ -1413,7 +1413,7 @@ class GenericLiteralWatcher : public SatPropagator {
   void WatchUpperBound(IntegerVariable var, int id, int watch_index = -1);
   void WatchIntegerVariable(IntegerVariable i, int id, int watch_index = -1);
 
-  // Because the coeff is always positive, whatching an affine expression is
+  // Because the coeff is always positive, watching an affine expression is
   // the same as watching its var.
   void WatchLowerBound(AffineExpression e, int id) {
     WatchLowerBound(e.var, id);
diff --git a/ortools/sat/linear_relaxation.cc b/ortools/sat/linear_relaxation.cc
index 1386e3e53f..d11911d35c 100644
--- a/ortools/sat/linear_relaxation.cc
+++ b/ortools/sat/linear_relaxation.cc
@@ -27,6 +27,7 @@
 #include "absl/log/check.h"
 #include "absl/meta/type_traits.h"
 #include "absl/types/span.h"
+#include "google/protobuf/message.h"
 #include "ortools/base/logging.h"
 #include "ortools/base/mathutil.h"
 #include "ortools/base/stl_util.h"
@@ -1438,7 +1439,7 @@ void TryToLinearizeConstraint(const CpModelProto& /*model_proto*/,
           PossibleOverflow(integer_trail, relaxation->linear_constraints[i]);
       if (issue) {
         LOG(INFO) << "Possible overflow in linearization of: "
-                  << ct.ShortDebugString();
+                  << google::protobuf::ShortFormat(ct);
       }
     }
   }
@@ -1946,8 +1947,7 @@ LinearRelaxation ComputeLinearRelaxation(const CpModelProto& model_proto,
           return relaxation;
         }
       } else if (lc.num_terms == 1) {
-        const AffineExpression expr =
-            AffineExpression(lc.vars[0], lc.coeffs[0]);
+        const AffineExpression expr(lc.vars[0], lc.coeffs[0]);
         if (lc.lb > integer_trail->LevelZeroLowerBound(expr)) {
           if (!integer_trail->Enqueue(expr.GreaterOrEqual(lc.lb), {}, {})) {
             return relaxation;
@@ -1958,7 +1958,6 @@ LinearRelaxation ComputeLinearRelaxation(const CpModelProto& model_proto,
             return relaxation;
           }
         }
-        break;
       }
     }
     if (!sat_solver->FinishPropagation()) return relaxation;