diff --git a/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh b/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh
index 9d3c812..fa46635 100755
--- a/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh
+++ b/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-update.sh
@@ -52,6 +52,14 @@
 	done
 }
 
+toobig() {
+	if test $(stat -L -c "%s" "$1") -gt $(cat /sys/class/mtd/"$2"/size)
+	then
+		return 0
+	fi
+	return 1
+}
+
 findmtd() {
 	m=$(grep -xl "$1" /sys/class/mtd/*/name)
 	m=${m%/name}
@@ -89,6 +97,7 @@
 dosave=y
 dorestore=y
 toram=
+checksize=y
 checkmount=y
 
 whitelist=/run/initramfs/whitelist
@@ -118,6 +127,9 @@
 	--no-flash)
 		doflash=
 		shift ;;
+	--ignore-size)
+		checksize=
+		shift ;;
 	--ignore-mount)
 		checkmount=
 		doflash=
@@ -165,6 +177,11 @@
 		echoerr "Unable to find mtd partiton for ${f##*/}."
 		exit 1
 	fi
+	if test -n "$checksize" && toobig "$f" "$m"
+	then
+		echoerr "Image ${f##*/} too big for $m."
+		exit 1
+	fi
 	for s in $m $(childmtds $m)
 	do
 		if test -n "$checkmount" && mtdismounted $s