diff --git a/src/pyj/read_book/db.pyj b/src/pyj/read_book/db.pyj
index f60210aad6..dc2dddd352 100644
--- a/src/pyj/read_book/db.pyj
+++ b/src/pyj/read_book/db.pyj
@@ -36,6 +36,13 @@ def get_error_details(event):
         desc = desc.error.toString()
     elif desc.errorCode:
         desc = desc.errorCode
+    elif desc.error:
+        desc = desc.error
+        if desc.name is 'QuotaExceededError':
+            desc = _('{}: Try deleting some stored books first').format('QuotaExceededError')
+        elif desc.name:
+            desc = desc.name
+    return desc or ''
 
 DB_NAME = 'calibre'
 DB_VERSION = 1