diff --git a/data/helpers.d/filesystem b/data/helpers.d/filesystem
index 27a016e63..bce58b5cf 100644
--- a/data/helpers.d/filesystem
+++ b/data/helpers.d/filesystem
@@ -70,6 +70,13 @@ ynh_bind_or_cp() {
 # usage: ynh_mkdir_tmp
 # | ret: the created directory path
 ynh_mkdir_tmp() {
-    echo "This helper is deprecated, you should use 'mktemp -d' instead." >&2
-    mktemp -d
+    echo "The helper ynh_mkdir_tmp is deprecated." >&2
+    echo "You should use 'mktemp -d' instead and manage permissions \
+properly with chmod/chown." >&2
+    local TMP_DIR=$(mktemp -d)
+
+    # Give rights to other users could be a security risk.
+    # But for retrocompatibility we need it. (This helpers is deprecated)
+    chmod 755 $TMP_DIR
+    echo $TMP_DIR
 }