diff --git a/code/__DEFINES/wiremod.dm b/code/__DEFINES/wiremod.dm
index 5ccc49b39ad..5e44de2395d 100644
--- a/code/__DEFINES/wiremod.dm
+++ b/code/__DEFINES/wiremod.dm
@@ -109,6 +109,8 @@
 #define CIRCUIT_FLAG_HIDDEN (1<<4)
 /// This circuit component has been marked as a component that has instant execution and will show up in the UI as so. This will only cause a visual change.
 #define CIRCUIT_FLAG_INSTANT (1<<5)
+/// This circuit component can't be loaded in module component. Saves us some headaches.
+#define CIRCUIT_FLAG_REFUSE_MODULE (1<<6)
 
 // Datatype flags
 /// The datatype supports manual inputs
diff --git a/code/modules/wiremod/components/abstract/module.dm b/code/modules/wiremod/components/abstract/module.dm
index 257028bd696..3566d619c9f 100644
--- a/code/modules/wiremod/components/abstract/module.dm
+++ b/code/modules/wiremod/components/abstract/module.dm
@@ -47,6 +47,9 @@
 	return ..()
 
 /obj/item/integrated_circuit/module/add_component(obj/item/circuit_component/to_add, mob/living/user)
+	if(to_add.circuit_flags & CIRCUIT_FLAG_REFUSE_MODULE)
+		balloon_alert(user, "doesn't fit into module!")
+		return
 	. = ..()
 	if(attached_module)
 		attached_module.circuit_size += to_add.circuit_size
diff --git a/code/modules/wiremod/components/action/mmi.dm b/code/modules/wiremod/components/action/mmi.dm
index 991e90a7b17..e0ee407a7e1 100644
--- a/code/modules/wiremod/components/action/mmi.dm
+++ b/code/modules/wiremod/components/action/mmi.dm
@@ -6,6 +6,7 @@
 /obj/item/circuit_component/mmi
 	display_name = "Man-Machine Interface"
 	desc = "A component that allows MMI to enter shells to send output signals."
+	circuit_flags = CIRCUIT_FLAG_REFUSE_MODULE
 
 	/// The message to send to the MMI in the shell.
 	var/datum/port/input/message
diff --git a/code/modules/wiremod/core/component.dm b/code/modules/wiremod/core/component.dm
index 5a6ac5ecc6e..b7a9fb5cfc1 100644
--- a/code/modules/wiremod/core/component.dm
+++ b/code/modules/wiremod/core/component.dm
@@ -82,7 +82,6 @@
 	if(circuit_flags & CIRCUIT_FLAG_INSTANT)
 		ui_color = "orange"
 
-
 /obj/item/circuit_component/Destroy()
 	if(parent)
 		// Prevents a Destroy() recursion
@@ -97,6 +96,11 @@
 	QDEL_LIST(input_ports)
 	return ..()
 
+/obj/item/circuit_component/examine(mob/user)
+	. = ..()
+	if(circuit_flags & CIRCUIT_FLAG_REFUSE_MODULE)
+		. += span_notice("It's incompatible with module components.")
+
 /**
  * Called when a shell is registered from the component/the component is added to a circuit.
  *