diff --git a/code/modules/mob/living/carbon/human/species/station/traits/negative_genes.dm b/code/modules/mob/living/carbon/human/species/station/traits/negative_genes.dm
index b5de25e93f6..caeb2e4a8b0 100644
--- a/code/modules/mob/living/carbon/human/species/station/traits/negative_genes.dm
+++ b/code/modules/mob/living/carbon/human/species/station/traits/negative_genes.dm
@@ -171,6 +171,8 @@
 	activation_message="You feel sore..."
 	primitive_expression_messages=list("shudders.","gasps.","chokes.")
 	added_component_path = /datum/component/rotting_disability
+	excludes = list(/datum/trait/positive/stable_genetics)
+	banned_species	= list(/datum/species/protean, /datum/species/shapeshifter/promethean)
 
 
 /datum/trait/negative/disability_gibbing
diff --git a/code/modules/mob/living/carbon/human/species/station/traits/positive.dm b/code/modules/mob/living/carbon/human/species/station/traits/positive.dm
index 9ea243b5839..b7bcddaf48e 100644
--- a/code/modules/mob/living/carbon/human/species/station/traits/positive.dm
+++ b/code/modules/mob/living/carbon/human/species/station/traits/positive.dm
@@ -471,6 +471,8 @@
 	cost = 2
 	custom_only = TRUE
 	var_changes = list("flags" = NO_DNA)
+	excludes = list(/datum/trait/negative/disability_deteriorating)
+	banned_species	= list(/datum/species/protean, /datum/species/shapeshifter/promethean)
 
 /datum/trait/positive/weaver/xenochimera
 	sort = TRAIT_SORT_SPECIES