diff --git a/installer/sharch_body.sh b/installer/sharch_body.sh
index d22fe26b6..19f46358a 100644
--- a/installer/sharch_body.sh
+++ b/installer/sharch_body.sh
@@ -24,6 +24,7 @@ if [ "$sha1" != "$payload_sha1" ] ; then
 fi
 
 echo " OK."
+image_size_in_kb=$((($(sed -e '1,/^exit_marker$/d' "$0"  | tar --to-stdout -xf - | wc -c) + 1023 ) / 1024))
 
 # Untar and launch install script in a tmpfs
 cur_wd=$(pwd)
@@ -32,6 +33,15 @@ archive_path=$(realpath "$0")
 tmp_dir=$(mktemp -d)
 if [ "$(id -u)" = "0" ] ; then
     mount -t tmpfs tmpfs-installer $tmp_dir || exit 1
+    mount_size_in_kb=$(df $tmp_dir | tail -1 | tr -s ' ' | cut -d' ' -f4)
+    #checking extra 100KB space in tmp_dir, after image extraction
+    padding=102400
+    if [ "$mount_size_in_kb" -le "$((image_size_in_kb + padding))" ]; then
+        image_size_in_mb=$(((image_size_in_kb + 1023) / 1024))
+        #Adding extra 32MB free space for image extraction.
+        mount_size_in_mb=$((((image_size_in_mb + 31) / 32) * 32))
+        mount -o remount,size="${mount_size_in_mb}M" -t tmpfs tmpfs-installer $tmp_dir || exit 1
+    fi
 fi
 cd $tmp_dir
 echo -n "Preparing image archive ..."