Documentation: correct custom field search example

diff --git a/docs/api.md b/docs/api.md
index 44c9a4bc42f16d300f1592eace5474f52dfd8963..d58c6a0f7213d761d9d5260b44bcce84cafbbfa2 100644 (file)
--- a/docs/api.md
+++ b/docs/api.md
@@ -132,7 +132,7 @@ use cases:
 
 5. Documents with a custom field "address" (text) that is empty:
 
-    `?custom_field_query=["OR", ["address", "isnull", true], ["address", "exact", ""]]`
+    `?custom_field_query=["OR", [["address", "isnull", true], ["address", "exact", ""]]]`
 
 6. Documents that don't have a field called "foo":