diff --git a/build/documentation/doxygen.cfg b/build/documentation/doxygen.cfg
index 847b5f1..1f0cd58 100644
--- a/build/documentation/doxygen.cfg
+++ b/build/documentation/doxygen.cfg
@@ -1171,7 +1171,7 @@ ECLIPSE_DOC_ID         = org.doxygen.Project
 # top of each HTML page. The value NO (the default) enables the index and
 # the value YES disables it.
 
-DISABLE_INDEX          = YES
+DISABLE_INDEX          = NO
 
 # The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
 # structure should be generated to display hierarchical information.