diff --git a/code/game/objects/structures/holosign.dm b/code/game/objects/structures/holosign.dm
index dc5355e9d8..1e278a9f88 100644
--- a/code/game/objects/structures/holosign.dm
+++ b/code/game/objects/structures/holosign.dm
@@ -9,6 +9,7 @@
 	armor = list("melee" = 0, "bullet" = 50, "laser" = 50, "energy" = 50, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 20, "acid" = 20)
 	var/obj/item/holosign_creator/projector
 	var/init_vis_overlay = TRUE
+	rad_flags = RAD_NO_CONTAMINATE
 
 /obj/structure/holosign/Initialize(mapload, source_projector)
 	. = ..()
diff --git a/html/changelogs/AutoChangeLog-pr-13433.yml b/html/changelogs/AutoChangeLog-pr-13433.yml
new file mode 100644
index 0000000000..43b03ea7b4
--- /dev/null
+++ b/html/changelogs/AutoChangeLog-pr-13433.yml
@@ -0,0 +1,4 @@
+author: "SiliconMain"
+delete-after: True
+changes: 
+  - tweak: "Holograms made from projectors (atmos, engi, sec, medical, ect...) can no longer be contaminated by radiation"