diff --git a/code/modules/DetectiveWork/footprints_and_rag.dm b/code/modules/DetectiveWork/footprints_and_rag.dm
index 5f8918c9074..7671dc543aa 100644
--- a/code/modules/DetectiveWork/footprints_and_rag.dm
+++ b/code/modules/DetectiveWork/footprints_and_rag.dm
@@ -10,24 +10,6 @@
 	var/transfer_blood = 0
 	var/mob/living/carbon/human/bloody_hands_mob
 
-proc/blood_incompatible(donor,receiver)
-	if(!donor || !receiver) return 0
-	var
-		donor_antigen = copytext(donor,1,lentext(donor))
-		receiver_antigen = copytext(receiver,1,lentext(receiver))
-		donor_rh = (findtext(donor,"+")>0)
-		receiver_rh = (findtext(receiver,"+")>0)
-	if(donor_rh && !receiver_rh) return 1
-	switch(receiver_antigen)
-		if("A")
-			if(donor_antigen != "A" && donor_antigen != "O") return 1
-		if("B")
-			if(donor_antigen != "B" && donor_antigen != "O") return 1
-		if("O")
-			if(donor_antigen != "O") return 1
-		//AB is a universal receiver.
-	return 0
-
 
 /obj/item/weapon/reagent_containers/glass/rag
 	name = "damp rag"
diff --git a/code/modules/organs/blood.dm b/code/modules/organs/blood.dm
index 6e3ac4feda4..882582e4a35 100644
--- a/code/modules/organs/blood.dm
+++ b/code/modules/organs/blood.dm
@@ -218,4 +218,22 @@ var/const/BLOOD_VOLUME_SURVIVE = 122
 			for(var/datum/reagent/blood/D in container.reagent_list)
 				if(D.data["donor"] == src)
 					return D
-	return res
\ No newline at end of file
+	return res
+
+proc/blood_incompatible(donor,receiver)
+	if(!donor || !receiver) return 0
+	var
+		donor_antigen = copytext(donor,1,lentext(donor))
+		receiver_antigen = copytext(receiver,1,lentext(receiver))
+		donor_rh = (findtext(donor,"+")>0)
+		receiver_rh = (findtext(receiver,"+")>0)
+	if(donor_rh && !receiver_rh) return 1
+	switch(receiver_antigen)
+		if("A")
+			if(donor_antigen != "A" && donor_antigen != "O") return 1
+		if("B")
+			if(donor_antigen != "B" && donor_antigen != "O") return 1
+		if("O")
+			if(donor_antigen != "O") return 1
+		//AB is a universal receiver.
+	return 0
\ No newline at end of file