diff --git a/wpilibj/src/athena/cpp/lib/CANJNI.cpp b/wpilibj/src/athena/cpp/lib/CANJNI.cpp
index 64fd454569..5acaa87fe8 100644
--- a/wpilibj/src/athena/cpp/lib/CANJNI.cpp
+++ b/wpilibj/src/athena/cpp/lib/CANJNI.cpp
@@ -77,7 +77,9 @@ Java_edu_wpi_first_wpilibj_can_CANJNI_FRCNetCommCANSessionMuxSendMessage(
 #endif
 }
 
+#ifdef CONFIG_ATHENA
 static uint8_t buffer[8];
+#endif
 
 /*
  * Class:     edu_wpi_first_wpilibj_can_CANJNI