diff --git a/docs/recipes/mathematical-precision.md b/docs/recipes/mathematical-precision.md
index 670e0e5c8..ab9b207fd 100644
--- a/docs/recipes/mathematical-precision.md
+++ b/docs/recipes/mathematical-precision.md
@@ -16,7 +16,7 @@
   "related": [
     "function-precisionevaluate"
   ],
-  "categories: [
+  "categories": [
     "math",
     "number"
   ]