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();
   }
 }
 
diff --git a/src/node_http2.h b/src/node_http2.h
index 9454301ec4665e..1fee25a8d054b0 100644
--- a/src/node_http2.h
+++ b/src/node_http2.h
@@ -431,7 +431,7 @@ class Http2Session : public AsyncWrap,
                   const SubmitTrailers& submit_trailers) override;
 
   void Send(WriteWrap* req, char* buf, size_t length) override;
-  WriteWrap* AllocateSend();
+  WriteWrap* AllocateSend() override;
 
   int DoWrite(WriteWrap* w, uv_buf_t* bufs, size_t count,
               uv_stream_t* send_handle) override;