diff --git a/source/core/query-plans.txt b/source/core/query-plans.txt
index 310d67fb99..d66bf55728 100644
--- a/source/core/query-plans.txt
+++ b/source/core/query-plans.txt
@@ -43,7 +43,7 @@ The following diagram illustrates the query planner logic:
 .. _cache-entry-state:
 
 Plan Cache Entry State
-~~~~~~~~~~~~~~~~~~~~~~
+----------------------
 
 Each plan cache query shape is associated with one of three states in 
 the cache: