diff --git a/docs/reference/gio/gio-docs.xml b/docs/reference/gio/gio-docs.xml
index b3dd9f0c9..e80a678d1 100644
--- a/docs/reference/gio/gio-docs.xml
+++ b/docs/reference/gio/gio-docs.xml
@@ -408,6 +408,10 @@
     <title>Index of new symbols in 2.76</title>
     <xi:include href="xml/api-index-2.76.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-78" role="2.78">
+    <title>Index of new symbols in 2.78</title>
+    <xi:include href="xml/api-index-2.78.xml"><xi:fallback /></xi:include>
+  </index>
 
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>
 
diff --git a/docs/reference/glib/glib-docs.xml b/docs/reference/glib/glib-docs.xml
index e378fd956..2b88abd74 100644
--- a/docs/reference/glib/glib-docs.xml
+++ b/docs/reference/glib/glib-docs.xml
@@ -305,6 +305,10 @@
     <title>Index of new symbols in 2.76</title>
     <xi:include href="xml/api-index-2.76.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-78" role="2.78">
+    <title>Index of new symbols in 2.78</title>
+    <xi:include href="xml/api-index-2.78.xml"><xi:fallback /></xi:include>
+  </index>
 
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>
 
diff --git a/docs/reference/gobject/gobject-docs.xml b/docs/reference/gobject/gobject-docs.xml
index ed32c3e97..eecabf933 100644
--- a/docs/reference/gobject/gobject-docs.xml
+++ b/docs/reference/gobject/gobject-docs.xml
@@ -226,6 +226,10 @@
     <title>Index of new symbols in 2.76</title>
     <xi:include href="xml/api-index-2.76.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-78" role="2.78">
+    <title>Index of new symbols in 2.78</title>
+    <xi:include href="xml/api-index-2.78.xml"><xi:fallback /></xi:include>
+  </index>
 
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>