diff --git a/messaging/messaging_java/build.gradle b/messaging/messaging_java/build.gradle
index 9a2126f779..6b2fccefc9 100644
--- a/messaging/messaging_java/build.gradle
+++ b/messaging/messaging_java/build.gradle
@@ -81,6 +81,14 @@ afterEvaluate {
              'https://github.com/google/flatbuffers.git',
              flatbuffersDir
       }
+      exec {
+        executable 'git'
+        args 'apply',
+             '../../scripts/git/patches/flatbuffers/0001-remove-unused-var.patch',
+             '--verbose',
+             '--directory',
+             'messaging/messaging_java/build/flatbuffers'
+        }
     }
 
     // Locate or build flatc.