diff --git a/code/modules/integrated_electronics/subtypes/arithmetic.dm b/code/modules/integrated_electronics/subtypes/arithmetic.dm
index d62c881c9d..ab2964bd19 100644
--- a/code/modules/integrated_electronics/subtypes/arithmetic.dm
+++ b/code/modules/integrated_electronics/subtypes/arithmetic.dm
@@ -315,31 +315,27 @@
 //CHOMPADDITION Math iterators
 /obj/item/integrated_circuit/arithmetic/iterator
 	name = "++"
-	desc = "This circuit adds 1 to its input."
-	extended_desc = "This circuit is equal to an operation performing X++."
+	desc = "This circuit adds Y to its input and provides it as an output."
+	extended_desc = "This circuit is equal to an operation performing X+Y but also modifes X to be the result."
 	icon_state = "addition"
-	inputs = list("input" = IC_PINTYPE_NUMBER)
+	inputs = list(	"input" = IC_PINTYPE_NUMBER,
+					"delta" = IC_PINTYPE_NUMBER)
+	outputs = list("result" = IC_PINTYPE_NUMBER)
 	spawn_flags = IC_SPAWN_DEFAULT|IC_SPAWN_RESEARCH
 	complexity = 1
 	power_draw_per_use = 1 // one of the most basic operators there is.
 	var/i = 1
 
-/obj/item/integrated_circuit/arithmetic/iterator/invert
-	name = "--"
-	desc = "This circuit subtracts 1 to its input."
-	extended_desc = "This circuit is equal to an operation performing X--."
-	icon_state = "subtraction"
-	i = -1
 
 /obj/item/integrated_circuit/arithmetic/iterator/do_work()
 	var/result = null
 	pull_data()
-	var/incoming = get_pin_data(IC_INPUT, 1)
-	if(!isnull(incoming))
-		result = incoming + i
-	else if(!incoming)
-		result = result
+	var/input = get_pin_data(IC_INPUT, 1)
+	var/delta = get_pin_data(IC_INPUT, 2)
+
+	result = input + delta
 
 	set_pin_data(IC_INPUT, 1, result)
+	set_pin_data(IC_OUTPUT, 1, result)
 	push_data()
 	activate_pin(2)