diff --git a/README b/README
index 2cad44d..cb08816 100644
--- a/README
+++ b/README
@@ -2563,6 +2563,11 @@
 of environment data (variable area); in general, we support the
 following configurations:
 
+- CONFIG_BUILD_ENVCRC:
+
+	Builds up envcrc with the target environment so that external utils
+	may easily extract it and embed it in final U-Boot images.
+
 - CONFIG_ENV_IS_IN_FLASH:
 
 	Define this if the environment is in flash memory.