diff --git a/docs/source/format/CDataInterface.rst b/docs/source/format/CDataInterface.rst
index 39d9bbdeadc..e4ba0095e49 100644
--- a/docs/source/format/CDataInterface.rst
+++ b/docs/source/format/CDataInterface.rst
@@ -686,7 +686,7 @@ release callback is trivial.
    void export_int32_type(struct ArrowSchema* schema) {
       *schema = (struct ArrowSchema) {
          // Type description
-         .format = "l",
+         .format = "i",
          .name = "",
          .metadata = NULL,
          .flags = 0,