1 files changed, 2 insertions, 1 deletions
diff --git a/runtime/thread.h b/runtime/thread.h
index 75b5b123da..4f26803726 100644
--- a/runtime/thread.h
+++ b/runtime/thread.h
@@ -1567,7 +1567,8 @@ class Thread {
 
 class SCOPED_CAPABILITY ScopedAssertNoThreadSuspension {
  public:
-  ALWAYS_INLINE ScopedAssertNoThreadSuspension(const char* cause) ACQUIRE(Roles::uninterruptible_) {
+  ALWAYS_INLINE explicit ScopedAssertNoThreadSuspension(const char* cause)
+      ACQUIRE(Roles::uninterruptible_) {
     if (kIsDebugBuild) {
       self_ = Thread::Current();
       old_cause_ = self_->StartAssertNoThreadSuspension(cause);