diff --git a/code/modules/organs/subtypes/augment/augments/auxiliary_heart.dm b/code/modules/organs/subtypes/augment/augments/auxiliary_heart.dm
index 32c386b2763..af45630f3f7 100644
--- a/code/modules/organs/subtypes/augment/augments/auxiliary_heart.dm
+++ b/code/modules/organs/subtypes/augment/augments/auxiliary_heart.dm
@@ -28,7 +28,7 @@
 
 	UnregisterSignal(owner, COMSIG_HEART_PUMP_EVENT)
 
-/obj/item/organ/internal/augment/bioaug/auxiliary_heart/proc/stabilize_circulation(var/obj/item/organ/internal/heart/heart, var/blood_volume, var/recent_pump, var/pulse_mod, var/min_efficiency)
+/obj/item/organ/internal/augment/bioaug/auxiliary_heart/proc/stabilize_circulation(var/implantee, var/obj/item/organ/internal/heart/heart, var/blood_volume, var/recent_pump, var/pulse_mod, var/min_efficiency)
 	SIGNAL_HANDLER
 	*min_efficiency *= 1.5
 	*blood_volume += 2.5 // This doesn't affect actual blood volume, only the "effective" volume used for calculating thresholds.
diff --git a/code/modules/organs/subtypes/augment/augments/mind_blanker.dm b/code/modules/organs/subtypes/augment/augments/mind_blanker.dm
index 627881c1217..4af61eaee66 100644
--- a/code/modules/organs/subtypes/augment/augments/mind_blanker.dm
+++ b/code/modules/organs/subtypes/augment/augments/mind_blanker.dm
@@ -27,7 +27,7 @@
 
 	UnregisterSignal(owner, COMSIG_PSI_MIND_POWER)
 
-/obj/item/organ/internal/augment/bioaug/mind_blanker/proc/cancel_power(mob/caster, var/cancelled)
+/obj/item/organ/internal/augment/bioaug/mind_blanker/proc/cancel_power(var/implantee, var/caster, var/cancelled)
 	SIGNAL_HANDLER
 	*cancelled = TRUE
 
@@ -60,7 +60,7 @@
 
 	UnregisterSignal(owner, COMSIG_PSI_MIND_POWER)
 
-/obj/item/organ/internal/augment/bioaug/mind_blanker_lethal/proc/cancel_power_lethal(mob/caster, var/cancelled)
+/obj/item/organ/internal/augment/bioaug/mind_blanker_lethal/proc/cancel_power_lethal(var/implantee, var/caster, var/cancelled)
 	SIGNAL_HANDLER
 	*cancelled = TRUE
 	if(isliving(caster))
diff --git a/code/modules/organs/subtypes/augment/augments/platelet_factories.dm b/code/modules/organs/subtypes/augment/augments/platelet_factories.dm
index a4b69955fc7..50de3ef94ee 100644
--- a/code/modules/organs/subtypes/augment/augments/platelet_factories.dm
+++ b/code/modules/organs/subtypes/augment/augments/platelet_factories.dm
@@ -31,12 +31,12 @@
 	UnregisterSignal(owner, COMSIG_HEART_PUMP_EVENT)
 	UnregisterSignal(owner, COMSIG_HEART_BLEED_EVENT)
 
-/obj/item/organ/internal/augment/bioaug/platelet_factories/proc/stroke_risk(var/obj/item/organ/internal/heart/heart, var/blood_volume, var/recent_pump, var/pulse_mod, var/min_efficiency)
+/obj/item/organ/internal/augment/bioaug/platelet_factories/proc/stroke_risk(var/implantee, var/obj/item/organ/internal/heart/heart, var/blood_volume, var/recent_pump, var/pulse_mod, var/min_efficiency)
 	SIGNAL_HANDLER
 	*min_efficiency *= 0.85
 	*pulse_mod *= 0.95
 
-/obj/item/organ/internal/augment/bioaug/platelet_factories/proc/reduce_bloodloss(var/blood_volume, var/cut_bloodloss_modifier, var/arterial_bloodloss_modifier)
+/obj/item/organ/internal/augment/bioaug/platelet_factories/proc/reduce_bloodloss(var/implantee, var/blood_volume, var/cut_bloodloss_modifier, var/arterial_bloodloss_modifier)
 	SIGNAL_HANDLER
 	*cut_bloodloss_modifier *= 0.1
 	*arterial_bloodloss_modifier *= 0.25
diff --git a/html/changelogs/hellfirejag-bioaugfixes.yml b/html/changelogs/hellfirejag-bioaugfixes.yml
new file mode 100644
index 00000000000..100032810dc
--- /dev/null
+++ b/html/changelogs/hellfirejag-bioaugfixes.yml
@@ -0,0 +1,4 @@
+author: Hellfirejag
+delete-after: True
+changes:
+  - bugfix: "Fixed mindblankers, auxiliary heart, and platelet factory implants not working as intended."