diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 46bd342171..ed3593aba2 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -437,7 +437,7 @@ DEFINE_BOOL(trace_verify_csa, false, "trace code stubs verification")
 DEFINE_STRING(csa_trap_on_node, nullptr,
               "trigger break point when a node with given id is created in "
               "given stub. The format is: StubName,NodeId")
-DEFINE_BOOL_READONLY(optimize_csa, false,
+DEFINE_BOOL_READONLY(optimize_csa, true,
                      "run the optimizing Turbofan backend in the CSA pipeline")
 DEFINE_NEG_IMPLICATION(optimize_csa, turbo_rewrite_far_jumps)
 DEFINE_BOOL_READONLY(fixed_array_bounds_checks, DEBUG_BOOL,