diff --git a/code/game/machinery/computer/records/security.dm b/code/game/machinery/computer/records/security.dm
index 8b32bf9af0a..89f49cf754b 100644
--- a/code/game/machinery/computer/records/security.dm
+++ b/code/game/machinery/computer/records/security.dm
@@ -179,7 +179,7 @@
 
 		if("set_note")
 			var/note = strip_html_full(params["note"], MAX_MESSAGE_LEN)
-			investigate_log("[user] has changed the security note of record: \"[target]\" from \"[target.security_note]\" to \"[note]\".")
+			investigate_log("[user] has changed the security note of record: \"[target]\" from \"[target.security_note]\" to \"[note]\".", INVESTIGATE_RECORDS)
 			target.security_note = note
 			return TRUE
 
diff --git a/code/modules/admin/admin_investigate.dm b/code/modules/admin/admin_investigate.dm
index edc3525bf2f..a329ad595fa 100644
--- a/code/modules/admin/admin_investigate.dm
+++ b/code/modules/admin/admin_investigate.dm
@@ -1,6 +1,8 @@
 /atom/proc/investigate_log(message, subject)
-	if(!message || !subject)
+	if(!message)
 		return
+	if(!subject)
+		CRASH("No subject provided for investigate_log")
 	var/F = file("[GLOB.log_directory]/[subject].html")
 	var/source = "[src]"
 
diff --git a/code/modules/atmospherics/machinery/air_alarm/air_alarm_circuit.dm b/code/modules/atmospherics/machinery/air_alarm/air_alarm_circuit.dm
index 7feee7f9cae..5263ae26c6d 100644
--- a/code/modules/atmospherics/machinery/air_alarm/air_alarm_circuit.dm
+++ b/code/modules/atmospherics/machinery/air_alarm/air_alarm_circuit.dm
@@ -96,7 +96,7 @@
 		return
 
 	connected_alarm.select_mode(parent.get_creator(), options_map[mode.value])
-	connected_alarm.investigate_log("was turned to [connected_alarm.selected_mode.name] by [parent.get_creator()]")
+	connected_alarm.investigate_log("was turned to [connected_alarm.selected_mode.name] by [parent.get_creator()]", INVESTIGATE_ATMOS)
 
 /obj/item/circuit_component/air_alarm
 	display_name = "Air Alarm Core Control"
diff --git a/code/modules/atmospherics/machinery/portable/canister.dm b/code/modules/atmospherics/machinery/portable/canister.dm
index 4fcfe158259..ff09ef15ea5 100644
--- a/code/modules/atmospherics/machinery/portable/canister.dm
+++ b/code/modules/atmospherics/machinery/portable/canister.dm
@@ -690,7 +690,7 @@
 	shielding_powered = !shielding_powered
 	SSair.start_processing_machine(src)
 	message_admins("[ADMIN_LOOKUPFLW(user)] turned [shielding_powered ? "on" : "off"] [wire_pulsed ? "via wire pulse" : ""] the [src] powered shielding.")
-	user.investigate_log("turned [shielding_powered ? "on" : "off"] [wire_pulsed ? "via wire pulse" : ""] the [src] powered shielding.")
+	user.investigate_log("turned [shielding_powered ? "on" : "off"] [wire_pulsed ? "via wire pulse" : ""] the [src] powered shielding.", INVESTIGATE_ATMOS)
 	update_appearance()
 
 /// Ejects tank from canister, if any
@@ -712,7 +712,7 @@
 	suppress_reactions = !suppress_reactions
 	SSair.start_processing_machine(src)
 	message_admins("[ADMIN_LOOKUPFLW(user)] turned [suppress_reactions ? "on" : "off"] [wire_pulsed ? "via wire pulse" : ""] the [src] reaction suppression.")
-	user.investigate_log("turned [suppress_reactions ? "on" : "off"] [wire_pulsed ? "via wire pulse" : ""] the [src] reaction suppression.")
+	user.investigate_log("turned [suppress_reactions ? "on" : "off"] [wire_pulsed ? "via wire pulse" : ""] the [src] reaction suppression.", INVESTIGATE_ATMOS)
 
 /obj/machinery/portable_atmospherics/canister/proc/recolor(datum/greyscale_modify_menu/menu)
 	set_greyscale(menu.split_colors, menu.config.type)
diff --git a/code/modules/atmospherics/machinery/portable/pipe_scrubber.dm b/code/modules/atmospherics/machinery/portable/pipe_scrubber.dm
index 434f243d6a3..60f3ac82bb8 100644
--- a/code/modules/atmospherics/machinery/portable/pipe_scrubber.dm
+++ b/code/modules/atmospherics/machinery/portable/pipe_scrubber.dm
@@ -153,7 +153,7 @@
 			internal_tank.suppress_reactions = !internal_tank.suppress_reactions
 			SSair.start_processing_machine(internal_tank)
 			message_admins("[ADMIN_LOOKUPFLW(usr)] turned [internal_tank.suppress_reactions ? "on" : "off"] the [internal_tank] reaction suppression.")
-			usr.investigate_log("turned [internal_tank.suppress_reactions ? "on" : "off"] the [internal_tank] reaction suppression.")
+			usr.investigate_log("turned [internal_tank.suppress_reactions ? "on" : "off"] the [internal_tank] reaction suppression.", INVESTIGATE_ATMOS)
 			. = TRUE
 	update_appearance()
 
diff --git a/code/modules/atmospherics/machinery/portable/pump.dm b/code/modules/atmospherics/machinery/portable/pump.dm
index 36d5bf4eb7c..99b75afa0f6 100644
--- a/code/modules/atmospherics/machinery/portable/pump.dm
+++ b/code/modules/atmospherics/machinery/portable/pump.dm
@@ -163,7 +163,7 @@
 			suppress_reactions = !suppress_reactions
 			SSair.start_processing_machine(src)
 			message_admins("[ADMIN_LOOKUPFLW(usr)] turned [suppress_reactions ? "on" : "off"] the [src] reaction suppression.")
-			usr.investigate_log("turned [suppress_reactions ? "on" : "off"] the [src] reaction suppression.")
+			usr.investigate_log("turned [suppress_reactions ? "on" : "off"] the [src] reaction suppression.", INVESTIGATE_ATMOS)
 			. = TRUE
 	update_appearance()
 
diff --git a/code/modules/atmospherics/machinery/portable/scrubber.dm b/code/modules/atmospherics/machinery/portable/scrubber.dm
index 29759e52e42..b1b094c9db0 100644
--- a/code/modules/atmospherics/machinery/portable/scrubber.dm
+++ b/code/modules/atmospherics/machinery/portable/scrubber.dm
@@ -185,7 +185,7 @@
 			suppress_reactions = !suppress_reactions
 			SSair.start_processing_machine(src)
 			message_admins("[ADMIN_LOOKUPFLW(usr)] turned [suppress_reactions ? "on" : "off"] the [src] reaction suppression.")
-			usr.investigate_log("turned [suppress_reactions ? "on" : "off"] the [src] reaction suppression.")
+			usr.investigate_log("turned [suppress_reactions ? "on" : "off"] the [src] reaction suppression.", INVESTIGATE_ATMOS)
 			. = TRUE
 	update_appearance()