diff --git a/code/datums/diseases/_disease.dm b/code/datums/diseases/_disease.dm
index 67e039d8237..88a4b54c711 100644
--- a/code/datums/diseases/_disease.dm
+++ b/code/datums/diseases/_disease.dm
@@ -87,7 +87,7 @@
 	stage = new_stage
 
 /datum/disease/proc/has_cure()
-	if(!(disease_flags & CURABLE | CHRONIC))
+	if(!(disease_flags & (CURABLE | CHRONIC)))
 		return FALSE
 
 	. = cures.len
diff --git a/code/modules/antagonists/revolution/revolution.dm b/code/modules/antagonists/revolution/revolution.dm
index 6d5885a77c2..31cab0c2ba6 100644
--- a/code/modules/antagonists/revolution/revolution.dm
+++ b/code/modules/antagonists/revolution/revolution.dm
@@ -563,7 +563,7 @@
 			player.med_hud_set_status()
 
 	for(var/datum/job/job as anything in SSjob.joinable_occupations)
-		if(!(job.departments_bitflags & DEPARTMENT_BITFLAG_SECURITY|DEPARTMENT_BITFLAG_COMMAND))
+		if(!(job.departments_bitflags & (DEPARTMENT_BITFLAG_SECURITY|DEPARTMENT_BITFLAG_COMMAND)))
 			continue
 		job.allow_bureaucratic_error = FALSE
 		job.total_positions = 0
diff --git a/code/modules/clothing/suits/toggles.dm b/code/modules/clothing/suits/toggles.dm
index 6a7cfb72642..75d684333d3 100644
--- a/code/modules/clothing/suits/toggles.dm
+++ b/code/modules/clothing/suits/toggles.dm
@@ -33,11 +33,11 @@
 	ToggleHood()
 
 /obj/item/clothing/suit/hooded/item_action_slot_check(slot, mob/user)
-	if(slot & ITEM_SLOT_OCLOTHING|ITEM_SLOT_NECK)
+	if(slot & (ITEM_SLOT_OCLOTHING|ITEM_SLOT_NECK))
 		return TRUE
 
 /obj/item/clothing/suit/hooded/equipped(mob/user, slot)
-	if(!(slot & ITEM_SLOT_OCLOTHING|ITEM_SLOT_NECK))
+	if(!(slot & (ITEM_SLOT_OCLOTHING|ITEM_SLOT_NECK)))
 		RemoveHood()
 	return ..()