diff --git a/sst28sf040.c b/sst28sf040.c
index 35f8c27..d3d7bdb 100644
--- a/sst28sf040.c
+++ b/sst28sf040.c
@@ -111,7 +111,7 @@
 	chip_writeb(RESET, bios);
 	programmer_delay(10);
 
-	printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, id1, id2);
+	printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
 	if (id1 == flash->manufacture_id && id2 == flash->model_id)
 		return 1;