diff --git a/gamedir/Data-1.13/Ja2_Options.INI b/gamedir/Data-1.13/Ja2_Options.INI
index 3d5e47cea..468eceb2c 100644
--- a/gamedir/Data-1.13/Ja2_Options.INI
+++ b/gamedir/Data-1.13/Ja2_Options.INI
@@ -563,6 +563,7 @@ BREATH_GAIN_REDUCTION_PER_RAIN_INTENSITY = 25
 
 [JA2 Thunder Settings]
 
+ALLOW_LIGHTNING = TRUE
 MIN_INTERVAL_BETWEEN_LIGHTNINGS_IN_REAL_TIME_SECONDS = 2
 MAX_INTERVAL_BETWEEN_LIGHTNINGS_IN_REAL_TIME_SECONDS = 15
 MIN_INTERVAL_BETWEEN_LIGHTNING_AND_THUNDERCLAPS_IN_SECONDS = 1