diff --git a/rules/S5500/cfamily/rule.adoc b/rules/S5500/cfamily/rule.adoc
index d3f529e395..9dc258542b 100644
--- a/rules/S5500/cfamily/rule.adoc
+++ b/rules/S5500/cfamily/rule.adoc
@@ -43,7 +43,7 @@ and requires the explicit move `return std::move(p)`.
 In contrast to returning local (stack) variables, named return value optimization (NRVO)
 does not apply to function parameters, so an explicit `std::move` call has no impact on optimizations.
 
-=== How to fix it
+== How to fix it
 
 This issue can be resolved in multiple ways: