diff --git a/code/modules/mob/inventory.dm b/code/modules/mob/inventory.dm
index 53f312ccdc6..c3d55e7167b 100644
--- a/code/modules/mob/inventory.dm
+++ b/code/modules/mob/inventory.dm
@@ -475,8 +475,10 @@
 
 ///Get all items in our possession that should affect our movespeed
 /mob/proc/get_equipped_speed_mod_items()
-	return get_equipped_items(INCLUDE_HELD|INCLUDE_ABSTRACT|INCLUDE_PROSTHETICS)
-
+	. = get_equipped_items(INCLUDE_ABSTRACT|INCLUDE_PROSTHETICS)
+	for(var/obj/item/thing in held_items)
+		if(thing.item_flags & SLOWS_WHILE_IN_HAND)
+			. += thing
 /**
  * Returns the items that were successfully unequipped.
  */
diff --git a/code/modules/unit_tests/_unit_tests.dm b/code/modules/unit_tests/_unit_tests.dm
index 54a6f1db363..2ef6664a605 100644
--- a/code/modules/unit_tests/_unit_tests.dm
+++ b/code/modules/unit_tests/_unit_tests.dm
@@ -177,6 +177,7 @@
 #include "gloves_and_shoes_armor.dm"
 #include "greyscale_config.dm"
 #include "hallucination_icons.dm"
+#include "held_slowdown.dm"
 #include "heretic_knowledge.dm"
 #include "heretic_rituals.dm"
 #include "high_five.dm"
diff --git a/code/modules/unit_tests/held_slowdown.dm b/code/modules/unit_tests/held_slowdown.dm
new file mode 100644
index 00000000000..0dbacd51246
--- /dev/null
+++ b/code/modules/unit_tests/held_slowdown.dm
@@ -0,0 +1,11 @@
+/// Tests SLOWS_WHILE_IN_HAND
+/datum/unit_test/held_slowdown
+
+/datum/unit_test/held_slowdown/Run()
+	var/mob/living/carbon/human/consistent/dummy = EASY_ALLOCATE()
+	var/obj/item/restraints/legcuffs/bola/bola = EASY_ALLOCATE()
+	dummy.put_in_hands(bola)
+	TEST_ASSERT(!(bola in dummy.get_equipped_speed_mod_items()), "Bola slows while held, when it shouldn't.")
+
+	bola.item_flags |= SLOWS_WHILE_IN_HAND
+	TEST_ASSERT((bola in dummy.get_equipped_speed_mod_items()), "Bola should slow while held now that it has the SLOWS_WHILE_IN_HAND flag.")