diff --git a/doc/EFFECTS_JSON.md b/doc/EFFECTS_JSON.md
index 9a549cc1a1596..922a27badaf2a 100644
--- a/doc/EFFECTS_JSON.md
+++ b/doc/EFFECTS_JSON.md
@@ -200,7 +200,7 @@ matching trait or effect then they are "resisting" the effect, which changes its
 Effects can only have one "resist_trait" and one "resist_effect" at a time.
 
 ### Immunity Flags
-````JSON
+```JSON
 "immunity_flags": [ "INFECTION_IMMUNE", "YOUR_FLAG" ]
 ```
 Having any of the defined character flags (See JSON_FLAGS.md#Character flags) will make you immune to the effect. Note that these are completely JSON-driven, so you can add a custom flag for your effect without C++ changes.