diff --git a/build_library/release_util.sh b/build_library/release_util.sh
index 1dc9148a2e..7a1fbf203c 100644
--- a/build_library/release_util.sh
+++ b/build_library/release_util.sh
@@ -101,7 +101,7 @@ compress_disk_images() {
     # We want to compress images, but we also want to remove the uncompressed files
     # from the list of uploadable files.
     for filename in "${local_files_to_evaluate[@]}"; do
-        if [[ "${filename}" =~ \.(img|bin|vdi|vhd|vmdk)$ ]]; then
+        if [[ "${filename}" =~ \.(img|bin|vdi|vhd|vmdk|qcow[2]?)$ ]]; then
             # Parse the formats as an array. This will yield an extra empty
             # array element at the end.
             readarray -td, FORMATS<<<"${FLAGS_image_compression_formats},"
diff --git a/build_library/vm_image_util.sh b/build_library/vm_image_util.sh
index c607471dda..490d8e1064 100644
--- a/build_library/vm_image_util.sh
+++ b/build_library/vm_image_util.sh
@@ -299,6 +299,7 @@ IMG_scaleway_DISK_LAYOUT=vm
 IMG_scaleway_OEM_PACKAGE=common-oem-files
 IMG_scaleway_OEM_USE=scaleway
 IMG_scaleway_OEM_SYSEXT=oem-scaleway
+IMG_scaleway_DISK_EXTENSION=qcow2
 
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