diff --git a/os/board/rtl8730e/src/component/mbed/targets/hal/rtl8730e/i2s_api.c b/os/board/rtl8730e/src/component/mbed/targets/hal/rtl8730e/i2s_api.c
index 7253db97e7..52ab23d4c7 100755
--- a/os/board/rtl8730e/src/component/mbed/targets/hal/rtl8730e/i2s_api.c
+++ b/os/board/rtl8730e/src/component/mbed/targets/hal/rtl8730e/i2s_api.c
@@ -20,7 +20,7 @@
 #include "ameba_audio_clock.h"
 #include "amebasmart_i2s.h"
 
-#define SP_MAX_DMA_PAGE_NUM 8
+#define SP_MAX_DMA_PAGE_NUM 9
 
 /** @addtogroup Ameba_Mbed_API
   * @{