diff --git a/runtime/vm/unit_test.cc b/runtime/vm/unit_test.cc
index 168f264..880a945 100644
--- a/runtime/vm/unit_test.cc
+++ b/runtime/vm/unit_test.cc
@@ -685,6 +685,7 @@
     val = lib.EvaluateCompiledExpression(kernel_bytes, kernel_length,
                                          Array::empty_array(), param_values,
                                          TypeArguments::null_type_arguments());
+    free(const_cast<uint8_t*>(kernel_bytes));
   }
   return Api::NewHandle(thread, val.raw());
 }