diff --git a/code/modules/surgery/organs/blood.dm b/code/modules/surgery/organs/blood.dm
index ba1a37f60ff..2464c0d795f 100644
--- a/code/modules/surgery/organs/blood.dm
+++ b/code/modules/surgery/organs/blood.dm
@@ -115,7 +115,7 @@
 			custom_emote(1, "coughs up blood!")
 			add_splatter_floor(loc, 1)
 			return 1
-		else if (amt >= 1 && prob(10 * amt)) // +5% chance per internal bleeding site that we'll cough up blood on a given tick. Must be bleeding internally in more than one place to have a chance at this.
+		else if (amt >= 1 && prob(5 * amt)) // +2.5% chance per internal bleeding site that we'll cough up blood on a given tick. Must be bleeding internally in more than one place to have a chance at this.
 			vomit(0, 1)
 			return 2
 	return 0