diff --git a/code/__defines/misc.dm b/code/__defines/misc.dm
index 855f0fe2a9e..5def0d2c24a 100644
--- a/code/__defines/misc.dm
+++ b/code/__defines/misc.dm
@@ -366,11 +366,6 @@ Will print: "/mob/living/carbon/human/death" (you can optionally embed it in a s
 #define USE_FAIL_NOT_IN_USER 6
 #define USE_FAIL_IS_SILICON 7
 
-// 510 doesn't have this flag, so this shim will turn it into a no-op if it doesn't exist.
-#ifndef SEE_BLACKNESS
-#define SEE_BLACKNESS 0
-#endif
-
 #define DEFAULT_SIGHT (SEE_SELF|SEE_BLACKNESS)
 
 #define isStationLevel(Z) ((Z) in current_map.station_levels)
diff --git a/html/changelogs/lohikar-blackness.yml b/html/changelogs/lohikar-blackness.yml
new file mode 100644
index 00000000000..edf6a2299c1
--- /dev/null
+++ b/html/changelogs/lohikar-blackness.yml
@@ -0,0 +1,4 @@
+author: Lohikar
+delete-after: True
+changes: 
+  - bugfix: "Objects partially obscured by shadow will no longer be partially fullbright."