diff --git a/components/drivers/spi/spi_flash_sfud.c b/components/drivers/spi/spi_flash_sfud.c
index 72d462a87192cd160b16652b2e3f35be1a99ea0a..9859cb0141dfe532a31173de7f1ab8a423dcecd8 100644
--- a/components/drivers/spi/spi_flash_sfud.c
+++ b/components/drivers/spi/spi_flash_sfud.c
@@ -189,7 +189,7 @@ void sfud_log_debug(const char *file, const long line, const char *format, ...)
     va_start(args, format);
     rt_kprintf("[SFUD] (%s:%ld) ", file, line);
     /* must use vprintf to print */
-    vsnprintf(log_buf, sizeof(log_buf), format, args);
+    rt_vsnprintf(log_buf, sizeof(log_buf), format, args);
     rt_kprintf("%s\n", log_buf);
     va_end(args);
 }
@@ -207,7 +207,7 @@ void sfud_log_info(const char *format, ...) {
     va_start(args, format);
     rt_kprintf("[SFUD] ");
     /* must use vprintf to print */
-    vsnprintf(log_buf, sizeof(log_buf), format, args);
+    rt_vsnprintf(log_buf, sizeof(log_buf), format, args);
     rt_kprintf("%s\n", log_buf);
     va_end(args);
 }