diff --git a/param.h b/param.h
index 514b13a3a..19cbe75a5 100644
--- a/param.h
+++ b/param.h
@@ -3367,6 +3367,8 @@ is a big desktop or server with abundant cache rather than a phone or embedded d
 
 #elif defined(NEOVERSEV1)
 
+#define SWITCH_RATIO  16
+
 #define SGEMM_DEFAULT_UNROLL_M  16
 #define SGEMM_DEFAULT_UNROLL_N  4