diff --git a/Userland/Libraries/LibWeb/CSS/Properties.json b/Userland/Libraries/LibWeb/CSS/Properties.json
index 18c51055530..fb047d09586 100644
--- a/Userland/Libraries/LibWeb/CSS/Properties.json
+++ b/Userland/Libraries/LibWeb/CSS/Properties.json
@@ -140,7 +140,7 @@
     "valid-types": [
       "ratio"
     ],
-    "valid-identifiers":[
+    "valid-identifiers": [
       "auto"
     ]
   },