diff --git a/code/modules/surgery/surgery_step.dm b/code/modules/surgery/surgery_step.dm
index 8b37e41574e..39ff4f2ff8f 100644
--- a/code/modules/surgery/surgery_step.dm
+++ b/code/modules/surgery/surgery_step.dm
@@ -78,8 +78,8 @@
 	speed_mod /= (get_location_modifier(target) * (1 + surgery.speed_modifier) * implement_speed_mod)
 	var/modded_time = time * speed_mod
 
-	fail_prob = min(max(0, modded_time - (time * SURGERY_SLOWDOWN_CAP_MULTIPLIER)),99)//if modded_time > time * 2, then fail_prob = modded_time - time*2. starts at 0, caps at 99
-	modded_time = min(modded_time, time * SURGERY_SLOWDOWN_CAP_MULTIPLIER)//also if that, then cap modded_time at time*2
+	fail_prob = min(max(0, modded_time - (time * SURGERY_SLOWDOWN_CAP_MULTIPLIER)),99)//if modded_time > time * modifier, then fail_prob = modded_time - time*modifier. starts at 0, caps at 99
+	modded_time = min(modded_time, time * SURGERY_SLOWDOWN_CAP_MULTIPLIER)//also if that, then cap modded_time at time*modifier
 
 	if(iscyborg(user))//any immunities to surgery slowdown should go in this check.
 		modded_time = time