diff --git a/board/siemens/SMN42/flash.c b/board/siemens/SMN42/flash.c
index 7d4977e..ae64096 100644
--- a/board/siemens/SMN42/flash.c
+++ b/board/siemens/SMN42/flash.c
@@ -70,8 +70,8 @@
 		 &flash_info[0]);
 
 	flash_protect (FLAG_PROTECT_SET,
-		 CFG_ENV_ADDR,
-		 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+		 CONFIG_ENV_ADDR,
+		 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 		 &flash_info[0]);
 
 	size += ext_flash_init();