diff --git a/addons/postgresql/dataprotection/common-scripts.sh b/addons/postgresql/dataprotection/common-scripts.sh
index e23b8d04d7..ba9436cb4a 100644
--- a/addons/postgresql/dataprotection/common-scripts.sh
+++ b/addons/postgresql/dataprotection/common-scripts.sh
@@ -100,7 +100,7 @@ function DP_purge_expired_files() {
   if [[ -z ${DP_TTL_SECONDS} || ${diff_time} -lt ${interval_seconds} ]]; then
      return
   fi
-  local expiredUnix=$((${currentUnix}-${DP_TTL_SECONDS}))
+  local expiredUnix=$((${currentUnix}-10#${DP_TTL_SECONDS}))
   local files
   if ! files=$(datasafed list -f --recursive --older-than ${expiredUnix} ${root_path}); then
       DP_error_log "failed to list expired WAL files" >&2
diff --git a/addons/postgresql/scripts-ut-spec/pitr_backup_spec.sh b/addons/postgresql/scripts-ut-spec/pitr_backup_spec.sh
index 4cc0b06ff0..be4f758ff1 100644
--- a/addons/postgresql/scripts-ut-spec/pitr_backup_spec.sh
+++ b/addons/postgresql/scripts-ut-spec/pitr_backup_spec.sh
@@ -433,6 +433,14 @@ EOF
       The path "${DP_BACKUP_INFO_FILE}" should not be exist
     End
 
+    It "treats a digit-only retention TTL as decimal when it has leading zeros"
+      export DATE_EPOCH_OUT=10000 DP_TTL_SECONDS=03600 DATASAFED_LIST_OUT=""
+      When call purge_and_report_checkpoint
+      The status should eq 0
+      The output should include "purge-checkpoint=10000"
+      The contents of file "${CALL_LOG}" should include "datasafed list -f --recursive --older-than 6400 /"
+    End
+
     It "fails without advancing the checkpoint when the expired-WAL listing fails"
       export DP_TTL_SECONDS=3600 DATASAFED_LIST_EXIT=17
       When call purge_and_report_checkpoint