diff --git a/overlay.d/05core/usr/lib/dracut/modules.d/40ignition-ostree/ignition-ostree-transposefs.sh b/overlay.d/05core/usr/lib/dracut/modules.d/40ignition-ostree/ignition-ostree-transposefs.sh
index 6f89c4007e..2c21220558 100755
--- a/overlay.d/05core/usr/lib/dracut/modules.d/40ignition-ostree/ignition-ostree-transposefs.sh
+++ b/overlay.d/05core/usr/lib/dracut/modules.d/40ignition-ostree/ignition-ostree-transposefs.sh
@@ -138,14 +138,13 @@ should_autosave_rootfs() {
         echo 0
         return
     fi
-    local agcount
-    eval $(xfs_info "${root_part}" | grep -o 'agcount=[0-9]*')
-    # Semi-arbitrarily chosen: this is roughly ~64G currently (based on initial
-    # ag sizing at build time) which seems like a good rootfs size at which to
-    # discriminate between "throwaway/short-lived systems" and "long-running
-    # workload systems". It's not like XFS performance is way worse at 128.
-    if [ "$agcount" -lt 128 ]; then
-        echo "Filesystem agcount is $agcount; skipping" >&2
+    # Find rootfs size in KiB
+    local rootsize
+    local reprovisionsize
+    rootsize=$(($(stat -f -c '%b * %s ${root_part} 1024' /)))
+    reprovisionsize=$((1024**3))
+    if [ "$rootsize" -lt "$reprovisionsize" ]; then
+        echo "Filesystem size $rootsize KiB is less than threshold $reprovisionsize KiB; skipping" >&2
         echo 0
         return
     fi