| diff --git a/centipede/distill.cc b/centipede/distill.cc | |
| index 84e8c13..2fdc7da 100644 | |
| --- a/centipede/distill.cc | |
| +++ b/centipede/distill.cc | |
| @@ -289,7 +289,7 @@ class DistillingInputFilter { | |
| Stats GetStats() { | |
| absl::MutexLock lock{&mu_}; | |
| - stats_.coverage_str = (std::stringstream{} << seen_features_).str(); | |
| + stats_.coverage_str = static_cast<std::ostringstream&>(std::stringstream{} << seen_features_).str(); | |
| return stats_; | |
| } | |