diff --git a/code/__DEFINES/movespeed_modification.dm b/code/__DEFINES/movespeed_modification.dm
index 5ebf1cb6267..68b06e4d564 100644
--- a/code/__DEFINES/movespeed_modification.dm
+++ b/code/__DEFINES/movespeed_modification.dm
@@ -32,4 +32,6 @@
 
 #define MOVESPEED_ID_PAI_SPACEWALK_SPEEDMOD				"PAI_SPACEWALK_MODIFIER"
 
-#define MOVESPEED_ID_SANITY								"MOOD_SANITY"
\ No newline at end of file
+#define MOVESPEED_ID_SANITY								"MOOD_SANITY"
+
+#define MOVESPEED_ID_SPECIES							"SPECIES_SPEED_MOD"
diff --git a/code/modules/mob/living/carbon/human/species.dm b/code/modules/mob/living/carbon/human/species.dm
index ed96d850a07..a3747b41f97 100644
--- a/code/modules/mob/living/carbon/human/species.dm
+++ b/code/modules/mob/living/carbon/human/species.dm
@@ -285,6 +285,8 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 		for(var/datum/disease/A in C.diseases)
 			A.cure(FALSE)
 
+	C.add_movespeed_modifier(MOVESPEED_ID_SPECIES, TRUE, 100, override=TRUE, multiplicative_slowdown=speedmod, movetypes=(~FLYING))
+
 	SEND_SIGNAL(C, COMSIG_SPECIES_GAIN, src, old_species)
 
 
@@ -295,6 +297,7 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 		C.Digitigrade_Leg_Swap(TRUE)
 	for(var/X in inherent_traits)
 		C.remove_trait(X, SPECIES_TRAIT)
+	C.remove_movespeed_modifier(MOVESPEED_ID_SPECIES)
 
 	SEND_SIGNAL(C, COMSIG_SPECIES_LOSS, src)
 
@@ -1071,7 +1074,6 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 			. -= 1
 		if(H.has_trait(TRAIT_GOTTAGOREALLYFAST))
 			. -= 2
-		. += speedmod
 		. += H.physiology.speed_mod
 
 	if(H.has_trait(TRAIT_IGNORESLOWDOWN))