diff --git a/src/uncategorized/clinicReport.tw b/src/uncategorized/clinicReport.tw
index 61d23fbbe0b80b9b4f892a9e0dd4a3f0534a2046..89c54131d0ca2e37bc9eb31ad94933077030432c 100644
--- a/src/uncategorized/clinicReport.tw
+++ b/src/uncategorized/clinicReport.tw
@@ -258,7 +258,7 @@
 			<<set $slaves[$i].pregControl = "speed up">>
 		<</if>>
 		<<if ($slaves[$i].chem > 10) && ($clinicUpgradeFilters == 1)>>
-			<<set $slaves[$i].chem -= 5 + (50 * $clinicUpgradePurge)>>
+			<<set $slaves[$i].chem -= (5 + (50 * $clinicUpgradePurge))>>
 			<<if $clinicUpgradePurge == 1 && $slaves[$i].health > -50>>
 				<<set $slaves[$i].health = -50>>
 			<</if>>