diff --git a/en/developer-reference.md b/en/developer-reference.md
index 6f7ea160..1ba60885 100644
--- a/en/developer-reference.md
+++ b/en/developer-reference.md
@@ -63,19 +63,19 @@ create a cross-site scripting (XSS) exploit. To avoid problems, please
treat block chain and memory pool data as an arbitrary input from an
untrusted source.
-
+
{% include ref_core_rpcs-abcdefg.md %}
-
+
{% include ref_core_rpcs-hijklmn.md %}
-
+
{% include ref_core_rpcs-opqrst.md %}
-
+
{% include ref_core_rpcs-uvwxyz.md %}