diff --git a/src/uncategorized/arcmgmt.tw b/src/uncategorized/arcmgmt.tw
index 6713874ab21bd0454c582687f2f239629875bbbb..85debf228ead78b84226b41521efa118d99e844e 100644
--- a/src/uncategorized/arcmgmt.tw
+++ b/src/uncategorized/arcmgmt.tw
@@ -689,7 +689,7 @@ $menialBioreactors -= _expirationBR>>
 <</if>>
 <<if $terrain == "urban">>
 	<<set _terrain = 1.2>>
-<<elseif $terrain == "rural" || "marine">>
+<<elseif $terrain == "rural" || $terrain == "marine">>
 	<<set _terrain = 1>>
 <<else>>
 	<<set _terrain = 0.8>>