diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 4263aac7d4..607b0c37e1 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -190,6 +190,7 @@ DEFINE_bool(trace_range, false, "trace range analysis")
 DEFINE_bool(trace_gvn, false, "trace global value numbering")
 DEFINE_bool(trace_representation, false, "trace representation types")
 DEFINE_bool(stress_pointer_maps, false, "pointer map for every instruction")
+DEFINE_bool(stress_environments, false, "environment for every instruction")
 DEFINE_int(deopt_every_n_times,
            0,
            "deoptimize every n times a deopt point is passed")