diff --git a/lib/util-iso.sh b/lib/util-iso.sh
index 3206ec4..d98dc1e 100644
--- a/lib/util-iso.sh
+++ b/lib/util-iso.sh
@@ -248,7 +248,8 @@ function seed_snaps() {
     if [[ -n "${strict_snaps}" ]] || [[ -n "${classic_snaps}" ]]; then
         # Preseeded snaps should be downloaded from a versioned channel
         rm -rfv "$1/${SEED_DIR}"
-        mkdir -p "$1/${SEED_DIR}"
+        mkdir -p "$1/${SEED_DIR}/snaps"
+        mkdir -p "$1/${SEED_DIR}/assertions"
         SEED_LIST=()
 
         # Download the published snaps and their related assert files