diff --git a/src/mavsdk/plugins/ftp/ftp_impl.cpp b/src/mavsdk/plugins/ftp/ftp_impl.cpp
index a90067dc54..af84acfee2 100644
--- a/src/mavsdk/plugins/ftp/ftp_impl.cpp
+++ b/src/mavsdk/plugins/ftp/ftp_impl.cpp
@@ -138,6 +138,7 @@ Ftp::Result FtpImpl::remove_file(const std::string& path)
     remove_file_async(path, [&](Ftp::Result result) { prom.set_value(result); });
 
     auto ret = fut.get();
+    (void)ret;
     return ret;
 }