diff --git a/ortools/linear_solver/BUILD.bazel b/ortools/linear_solver/BUILD.bazel
index 85e3bdfd88..2a89981456 100644
--- a/ortools/linear_solver/BUILD.bazel
+++ b/ortools/linear_solver/BUILD.bazel
@@ -230,6 +230,7 @@ cc_library(
 cc_binary(
     name = "solve",
     srcs = ["solve.cc"],
+    defines = ["USE_LP_PARSER"],
     deps = [
         ":linear_solver",
         ":linear_solver_cc_proto",
diff --git a/ortools/linear_solver/proto_solver/scip_proto_solver.cc b/ortools/linear_solver/proto_solver/scip_proto_solver.cc
index ea8fc8aa6c..dd036ea517 100644
--- a/ortools/linear_solver/proto_solver/scip_proto_solver.cc
+++ b/ortools/linear_solver/proto_solver/scip_proto_solver.cc
@@ -442,11 +442,11 @@ absl::Status AddMinMaxConstraint(const MPGeneralConstraintProto& gen_cst,
     vars = {scip_resultant_var};
     vals = {1};
     if (gen_cst.has_min_constraint()) {
-      RETURN_IF_ERROR(add_lin_constraint(absl::StrCat("_ineq_constant"),
-                                         -kInfinity, minmax.constant()));
+      RETURN_IF_ERROR(
+          add_lin_constraint("_ineq_constant", -kInfinity, minmax.constant()));
     } else {
-      RETURN_IF_ERROR(add_lin_constraint(absl::StrCat("_ineq_constant"),
-                                         minmax.constant(), kInfinity));
+      RETURN_IF_ERROR(
+          add_lin_constraint("_ineq_constant", minmax.constant(), kInfinity));
     }
   }
   for (SCIP_CONS* scip_cons : cons) {
diff --git a/ortools/linear_solver/solve.cc b/ortools/linear_solver/solve.cc
index 187d451eb5..89a108af72 100644
--- a/ortools/linear_solver/solve.cc
+++ b/ortools/linear_solver/solve.cc
@@ -133,11 +133,15 @@ MPModelRequest ReadMipModel(const std::string& input) {
   MPModelRequest request_proto;
   MPModelProto model_proto;
   if (absl::EndsWith(input, ".lp")) {
+#if defined(USE_LP_PARSER)
     std::string data;
     CHECK_OK(file::GetContents(input, &data, file::Defaults()));
     absl::StatusOr<MPModelProto> result = ModelProtoFromLpFormat(data);
     CHECK_OK(result);
     model_proto = std::move(result).value();
+#else   // !defined(USE_LP_PARSER)
+    LOG(FATAL) << "Support for parsing LP format is not compiled in.";
+#endif  // !defined(USE_LP_PARSER)
   } else if (absl::EndsWith(input, ".mps") ||
              absl::EndsWith(input, ".mps.gz")) {
     QCHECK_OK(glop::MPSReader().ParseFile(input, &model_proto))