diff --git a/locales/en.json b/locales/en.json
index 10c056d9b..06a91abf0 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -22,7 +22,7 @@
     "custom_app_url_required" : "You must provide an URL to upgrade your custom app {app:s}",
     "app_requirements_checking" : "Checking required packages...",
     "app_requirements_unmeet" : "Requirements are not met, the package {pkgname} ({version}) must be {spec}",
-    "app_requirements_failed" : "Unable to meet requirements: {err}",
+    "app_requirements_failed" : "Unable to meet requirements: {error}",
     "app_upgraded" : "{app:s} successfully upgraded",
     "app_upgrade_failed" : "Unable to upgrade {app:s}",
     "app_id_invalid" : "Invalid app id",
diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 1659aa793..032f7fb4a 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -1401,7 +1401,8 @@ def _check_manifest_requirements(manifest):
             *requirements.keys(), strict=True, as_dict=True)
     except packages.PackageException as e:
         raise MoulinetteError(errno.EINVAL,
-                              m18n.n('app_requirements_failed', err=str(e)))
+                              m18n.n('app_requirements_failed',
+                                     error=str(e)))
 
     # Iterate over requirements
     for pkgname, spec in requirements.items():