diff --git a/tools/clusterfuzz/v8_fuzz_flags.json b/tools/clusterfuzz/v8_fuzz_flags.json
index 851694b89a..7aefe69267 100644
--- a/tools/clusterfuzz/v8_fuzz_flags.json
+++ b/tools/clusterfuzz/v8_fuzz_flags.json
@@ -29,5 +29,6 @@
   [0.1, "--no-lazy-feedback-allocation --interrupt-budget=100"],
   [0.05, "--budget-for-feedback-vector-allocation=0"],
   [0.1, "--no-wasm-generic-wrapper"],
+  [0.1, "--turbo-force-mid-tier-regalloc"],
   [0.0001, "--simulate-errors"]
 ]
diff --git a/tools/testrunner/testproc/fuzzer.py b/tools/testrunner/testproc/fuzzer.py
index 67250b1c74..143a919fe1 100644
--- a/tools/testrunner/testproc/fuzzer.py
+++ b/tools/testrunner/testproc/fuzzer.py
@@ -49,6 +49,7 @@ EXTRA_FLAGS = [
   (0.1, '--stress-wasm-code-gc'),
   (0.1, '--turbo-instruction-scheduling'),
   (0.1, '--turbo-stress-instruction-scheduling'),
+  (0.1, '--turbo-force-mid-tier-regalloc'),
 ]
 
 def random_extra_flags(rng):