diff --git a/debian/changelog b/debian/changelog
index 0e513ae2..f06e61b2 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+livecd-rootfs (2.664.10) UNRELEASED; urgency=medium
+
+  * Do not hard-code the UC20 amd64 image size as now ubuntu-image should be
+    able to properly calculate the needed size itself.
+
+ -- Łukasz 'sil2100' Zemczak <lukasz.zemczak@ubuntu.com>  Fri, 27 Nov 2020 17:58:38 +0100
+
 livecd-rootfs (2.664.9) focal; urgency=medium
 
    [ John Chittum]
diff --git a/live-build/auto/config b/live-build/auto/config
index a3f1e2c0..8f275695 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -364,9 +364,6 @@ case $IMAGEFORMAT in
 							xenial|bionic)
 								UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS --image-size 3700M"
 								;;
-							*)
-								UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS --image-size 8G"
-								;;
 						esac
 					fi
 					;;