diff --git a/src/ersky9x/board.h b/src/ersky9x/board.h
index 138b62595..ba1f9c335 100644
--- a/src/ersky9x/board.h
+++ b/src/ersky9x/board.h
@@ -41,8 +41,6 @@
 #define TRACE_INFO(...)
 #define TRACE_INFO_WP(...)
 
-#define assert(x)
-
 #include <stdint.h>
 #include <stdbool.h>