diff --git a/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm b/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm
index cf5ad59f501..e4c646cd1c7 100644
--- a/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm
@@ -2152,7 +2152,8 @@ All effects don't start immediately, but rather get worse over time; the rate is
 	generate_data_info(data)
 
 /datum/reagent/consumable/ethanol/fruit_wine/proc/generate_data_info(list/data)
-	var/minimum_percent = 0.15 //Percentages measured between 0 and 1.
+	// BYOND's compiler fails to catch non-consts in a ranged switch case, and it causes incorrect behavior. So this needs to explicitly be a constant.
+	var/const/minimum_percent = 0.15 //Percentages measured between 0 and 1.
 	var/list/primary_tastes = list()
 	var/list/secondary_tastes = list()
 	glass_name = "glass of [name]"