diff --git a/principals/mission-critical-systems/04-redundancy-and-common-mode-failure.md b/principals/mission-critical-systems/04-redundancy-and-common-mode-failure.md
index 91e4769..ecef112 100644
--- a/principals/mission-critical-systems/04-redundancy-and-common-mode-failure.md
+++ b/principals/mission-critical-systems/04-redundancy-and-common-mode-failure.md
@@ -4,7 +4,7 @@
 
 Credits: Hazem Ali
 
-## Hazem principal
+## Hazem's Principle
 
 Two replicas are not independent when they share the assumption that fails.