diff --git a/code/application/source/sf_app/code/include/sf_device.h b/code/application/source/sf_app/code/include/sf_device.h
index 2edccbb32..af217b258 100644
--- a/code/application/source/sf_app/code/include/sf_device.h
+++ b/code/application/source/sf_app/code/include/sf_device.h
@@ -47,7 +47,7 @@ SINT32 app_led_pin_init(void);
 
 SINT32 sf_in_card_exist(void);
 
-SINT32 sf_in_emmc_exist(void);
+BOOL sf_in_emmc_exist(void);
 
 SINT32 sf_is_card_full(void);
 
diff --git a/code/application/source/sf_app/code/source/app/sf_device.c b/code/application/source/sf_app/code/source/app/sf_device.c
index 7913b8af4..885bbbbfb 100755
--- a/code/application/source/sf_app/code/source/app/sf_device.c
+++ b/code/application/source/sf_app/code/source/app/sf_device.c
@@ -531,7 +531,7 @@ SINT32 sf_in_card_exist(void)
     return (regValue & 0xFF) ? 0:1;
 }
 
-SINT32 sf_in_emmc_exist(void)
+BOOL sf_in_emmc_exist(void)
 {
     if (access("/dev/mmcblk1p1", F_OK) == SUCCESS) {
         return 1;
diff --git a/code/lib/source/sifar/code/include/sf_sd_common.h b/code/lib/source/sifar/code/include/sf_sd_common.h
index ad70ad5ff..6a3d371ed 100644
--- a/code/lib/source/sifar/code/include/sf_sd_common.h
+++ b/code/lib/source/sifar/code/include/sf_sd_common.h
@@ -16,7 +16,7 @@ typedef BOOL (*SF_CALLBACK_SD_CMD)(void);
 void sf_sd_exist_reg_cb(SF_CALLBACK_SD_CMD fpCB);
 
 BOOL sf_in_card_exist(void);
-SINT32 sf_in_emmc_exist(void);
+BOOL sf_in_emmc_exist(void);
 void sf_set_card_statu(UINT32 val);
 UINT32 sf_get_card_statu(void);
 
diff --git a/code/lib/source/sifar/code/source/common/sf_sd_common.c b/code/lib/source/sifar/code/source/common/sf_sd_common.c
index 2205e3c58..2d9ff3b49 100644
--- a/code/lib/source/sifar/code/source/common/sf_sd_common.c
+++ b/code/lib/source/sifar/code/source/common/sf_sd_common.c
@@ -68,7 +68,7 @@ BOOL sf_in_card_exist(void)
 
 }
 
-SINT32 sf_in_emmc_exist(void)
+BOOL sf_in_emmc_exist(void)
 {
     if (access("/dev/mmcblk1p1", F_OK) == SUCCESS) {
         return 1;