diff --git a/tools/hitag2crack/crack5opencl/threads.h b/tools/hitag2crack/crack5opencl/threads.h
index 0442a8f8c..6aa958fad 100644
--- a/tools/hitag2crack/crack5opencl/threads.h
+++ b/tools/hitag2crack/crack5opencl/threads.h
@@ -128,7 +128,6 @@ int thread_stop(thread_ctx_t *ctx);
 int thread_start_scheduler(thread_ctx_t *ctx, thread_args_t *t_arg, wu_queue_ctx_t *queue_ctx);
 bool thread_setEnd(thread_ctx_t *ctx, thread_args_t *t_arg);
 
-void tprintf(const char *restrict format, ...);
 const char *thread_strerror(int error);
 const char *thread_status_strdesc(thread_status_t s);