diff --git a/gamedir/Data-1.13/Ja2_Options.INI b/gamedir/Data-1.13/Ja2_Options.INI
index ba0be8f49..45bfac863 100644
--- a/gamedir/Data-1.13/Ja2_Options.INI
+++ b/gamedir/Data-1.13/Ja2_Options.INI
@@ -4423,6 +4423,10 @@ TEACHER_TRAIT_BONUS_TO_TRAINING_EFFICIENCY = 30
 ; The minimum skill rating a character must have before he can train fellow teammates in that skill.
 MIN_SKILL_REQUIRED_TO_TEACH_OTHER = 25
 
+; The <bEvolution>-tag in MercProfiles.xml controls whether mercs are stopped from increasing their stats. If TRUE, that tag is 
+; disabled and increasing stats works normally.
+DISABLE_EVOLUTION = TRUE
+
 ;------------------------------------------------------------------------------------------------------------------------------
 ; Two settings to synchronize the sleep/wake periods of Trainers and Students in the same sector.
 ;