diff --git a/project/Core/Inc/tftp.h b/project/Core/Inc/tftp.h
index 4b28c33..de01a2a 100644
--- a/project/Core/Inc/tftp.h
+++ b/project/Core/Inc/tftp.h
@@ -22,7 +22,9 @@ extern "C" {
 
 #define TFTP_READ 0
 
+#ifndef UNUSED
 #define UNUSED(x) (void)(x)
+#endif
 
 typedef struct tftp_custom_file_s {
     char* data;