diff --git a/src/env.cc b/src/env.cc
index 9bed08cdb09175..6abb224293c26f 100644
--- a/src/env.cc
+++ b/src/env.cc
@@ -263,7 +263,7 @@ void CollectExceptionInfo(Environment* env,
 
   if (syscall != nullptr) {
     obj->Set(env->context(), env->syscall_string(),
-             OneByteString(env->isolate(), syscall));
+             OneByteString(env->isolate(), syscall)).FromJust();
   }
 }