1 files changed, 6 insertions, 5 deletions

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 35fd6f864f..d30738597a 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -347,13 +347,14 @@ IMAGE_BASENAME = "${PN}"
 IMAGE_NAME = "${IMAGE_BASENAME}-${MACHINE}-${DATETIME}"
 IMAGE_LINK_NAME = "${IMAGE_BASENAME}-${MACHINE}"
 
-# This option allows for a precentage overage of the actaul image size rather than a
-# fixed extra space
+# This option allows for a percentage overage of the actual image size rather than a
+# fixed extra space, this is space needed for initial startup and basic operations.
 IMAGE_OVERHEAD_FACTOR ?= 1.3
 # This option allow for adding addition space in K above and beyond what the 
-# IMAGE_OVERHEAD_FACTOR might add. To set a fixed size then overrideing IMAGE_ROOTFS_SIZE
-# with the max size one wants should do the trick
-IMAGE_ROOTFS_EXTRA_SPACE = "0"
+# IMAGE_OVERHEAD_FACTOR might add. This space is for additional packages, user data, ...
+# To set a fixed size then overrideing IMAGE_ROOTFS_SIZE with the max size one wants
+# should do the trick
+IMAGE_ROOTFS_EXTRA_SPACE ?= "0"
 
 EXTRA_IMAGEDEPENDS = ""