diff --git a/app/main.c b/app/main.c
index 0467c6f..c938b84 100644
--- a/app/main.c
+++ b/app/main.c
@@ -48,7 +48,7 @@ int main(void)
     jj_param_eeprom_init();
 
     mt9v03x_init();
-    mt9v03x_sccb_set_exposure_time((uint8_t)auto_exp);
+    mt9v03x_sccb_set_exposure_time((uint16_t)auto_exp);
 
     Page_Init();