diff --git a/code/modules/organs/blood.dm b/code/modules/organs/blood.dm
index 6621e0f102b..575ded61383 100644
--- a/code/modules/organs/blood.dm
+++ b/code/modules/organs/blood.dm
@@ -216,7 +216,7 @@ var/const/BLOOD_VOLUME_SURVIVE = 122
 //Transfers blood from reagents to vessel, respecting blood types compatability.
 /mob/living/carbon/human/inject_blood(var/datum/reagent/blood/injected, var/amount)
 
-	if(should_have_organ(O_HEART))
+	if(!should_have_organ(O_HEART))
 		reagents.add_reagent("blood", amount, injected.data)
 		reagents.update_total()
 		return