diff --git a/src/mutation.h b/src/mutation.h
index 8254623500ecd..0c5c2f2430b68 100644
--- a/src/mutation.h
+++ b/src/mutation.h
@@ -153,8 +153,8 @@ struct mutation_branch {
         /**What do you smell like*/
         cata::optional<scenttype_id> scent_typeid;
 
-        /**Map of glowing bodypart and there intensity*/
-        std::map<body_part, int> lumination;
+        /**Map of glowing body parts and their glow intensity*/
+        std::map<body_part, float> lumination;
 
         /**Rate at which bmi above character_weight_category::normal increases the character max_hp*/
         float fat_to_max_hp = 0.0f;