diff --git a/components/sidebars/SidebarSingleSlateSettings.js b/components/sidebars/SidebarSingleSlateSettings.js
index d837ff58..c3ab81b4 100644
--- a/components/sidebars/SidebarSingleSlateSettings.js
+++ b/components/sidebars/SidebarSingleSlateSettings.js
@@ -143,7 +143,8 @@ export default class SidebarSingleSlateSettings extends React.Component {
         if (
           object.type &&
           object.type.startsWith("image/") &&
-          (!object.size || object.size < SIZE_LIMIT)
+          object.size &&
+          object.size < SIZE_LIMIT
         ) {
           preview = object.url.replace("https://undefined", "https://");
           break;
diff --git a/pages/_/slate.js b/pages/_/slate.js
index fa88a5f8..ed8dfbda 100644
--- a/pages/_/slate.js
+++ b/pages/_/slate.js
@@ -255,7 +255,8 @@ export default class SlatePage extends React.Component {
           if (
             objects[i].type &&
             objects[i].type.startsWith("image/") &&
-            (!objects[i].size || objects[i].size < SIZE_LIMIT)
+            objects[i].size &&
+            objects[i].size < SIZE_LIMIT
           ) {
             image = objects[i].url.replace("https://undefined", "https://");
             break;