diff --git a/code/__DEFINES/flags.dm b/code/__DEFINES/flags.dm
index 2b2adbdbaf2..cc19905183c 100644
--- a/code/__DEFINES/flags.dm
+++ b/code/__DEFINES/flags.dm
@@ -43,6 +43,7 @@
 #define RADIMMUNE		2048
 #define ALL_RPARTS		4096
 #define NOGUNS			8192
+#define LING_PROTECT	16384
 
 //Species clothing flags
 #define HAS_UNDERWEAR 	1
diff --git a/code/game/gamemodes/changeling/changeling.dm b/code/game/gamemodes/changeling/changeling.dm
index 9fb2402f889..ade5948f34e 100644
--- a/code/game/gamemodes/changeling/changeling.dm
+++ b/code/game/gamemodes/changeling/changeling.dm
@@ -9,7 +9,7 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 	config_tag = "changeling"
 	restricted_jobs = list("AI", "Cyborg")
 	protected_jobs = list("Security Officer", "Warden", "Detective", "Head of Security", "Captain", "Blueshield", "Nanotrasen Representative", "Security Pod Pilot", "Magistrate", "Brig Physician", "Internal Affairs Agent", "Nanotrasen Navy Officer", "Special Operations Officer")
-	protected_species = list("Machine", "Slime People", "Plasmaman")
+	protected_species = list("Machine", "Plasmaman")
 	required_players = 15
 	required_enemies = 1
 	recommended_enemies = 4
@@ -313,18 +313,14 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 		to_chat(user, "<span class='warning'>This creature does not have DNA!</span>")
 		return
 
-	if(T.species.flags & NO_SCAN)
+	if(T.species.flags & LING_PROTECT)
 		to_chat(user, "<span class='warning'>We do not know how to parse this creature's DNA!</span>")
 		return
 
-	if(T.species.flags & NO_BLOOD)
-		to_chat(user, "<span class='warning'>We are not able to use the DNA of a creature without a circulatory system.</span>")
-		return
-
 	if(has_dna(target.dna))
 		to_chat(user, "<span class='warning'>We already have this DNA in storage!</span>")
 
 	return 1
 
 /proc/check_species_absorb(datum/species/S)
-  return !((S.flags & NO_DNA) || (S.flags & NO_SCAN) || (S.flags & NO_BLOOD))
+  return !((S.flags & NO_DNA) || (S.flags & LING_PROTECT))
diff --git a/code/game/gamemodes/changeling/powers/swap_form.dm b/code/game/gamemodes/changeling/powers/swap_form.dm
index ce8bda64d03..ece49c84605 100644
--- a/code/game/gamemodes/changeling/powers/swap_form.dm
+++ b/code/game/gamemodes/changeling/powers/swap_form.dm
@@ -17,7 +17,7 @@
 	if((NOCLONE || SKELETON || HUSK) in target.mutations)
 		to_chat(user, "<span class='warning'>DNA of [target] is ruined beyond usability!</span>")
 		return
-	if(!istype(target) || issmall(target) || target.species.flags & NO_DNA || target.species.flags & NO_SCAN || target.species.flags & NO_BLOOD)
+	if(!istype(target) || issmall(target) || target.species.flags & NO_DNA || target.species.flags & LING_PROTECT)
 		to_chat(user, "<span class='warning'>[target] is not compatible with this ability.</span>")
 		return
 	return 1
diff --git a/code/game/gamemodes/changeling/powers/tiny_prick.dm b/code/game/gamemodes/changeling/powers/tiny_prick.dm
index f4aa6f3d8f2..3478e11ab1b 100644
--- a/code/game/gamemodes/changeling/powers/tiny_prick.dm
+++ b/code/game/gamemodes/changeling/powers/tiny_prick.dm
@@ -90,12 +90,9 @@
 		return 0
 	if(ishuman(target))
 		var/mob/living/carbon/human/H = target
-		if(H.species.flags & NO_SCAN) //Prevents transforming slimes and killing them instantly
+		if(H.species.flags & LING_PROTECT)
 			to_chat(user, "<span class='warning'>This won't work on a creature with abnormal genetic material.</span>")
 			return 0
-		if(H.species.flags & NO_BLOOD)
-			to_chat(user, "<span class='warning'>This won't work on a creature without a circulatory system.</span>")
-			return 0
 		if(H.species.flags & NO_DNA)
 			to_chat(user, "<span class='warning'>This won't work on a creature without DNA.</span>")
 			return 0
diff --git a/code/game/gamemodes/changeling/traitor_chan.dm b/code/game/gamemodes/changeling/traitor_chan.dm
index 7ef4f0bc7b4..624ebd4698e 100644
--- a/code/game/gamemodes/changeling/traitor_chan.dm
+++ b/code/game/gamemodes/changeling/traitor_chan.dm
@@ -6,7 +6,7 @@
 	required_players = 10
 	required_enemies = 1	// how many of each type are required
 	recommended_enemies = 3
-	var/protected_species_changeling = list("Machine", "Slime People")
+	var/protected_species_changeling = list("Machine", "Plasmaman")
 
 /datum/game_mode/traitor/changeling/announce()
 	to_chat(world, "<B>The current game mode is - Traitor+Changeling!</B>")
diff --git a/code/modules/mob/living/carbon/human/species/plasmaman.dm b/code/modules/mob/living/carbon/human/species/plasmaman.dm
index d8434a87223..406722d3e40 100644
--- a/code/modules/mob/living/carbon/human/species/plasmaman.dm
+++ b/code/modules/mob/living/carbon/human/species/plasmaman.dm
@@ -6,7 +6,7 @@
 	//language = "Clatter"
 	unarmed_type = /datum/unarmed_attack/punch
 
-	flags = IS_WHITELISTED | NO_BLOOD
+	flags = IS_WHITELISTED | NO_BLOOD | LING_PROTECT
 	dietflags = DIET_OMNI
 	reagent_tag = PROCESS_ORG