diff --git a/code/__DEFINES/_flags/_flags.dm b/code/__DEFINES/_flags/_flags.dm
index a1d8006dbd..6e018b1eeb 100644
--- a/code/__DEFINES/_flags/_flags.dm
+++ b/code/__DEFINES/_flags/_flags.dm
@@ -162,3 +162,6 @@ GLOBAL_LIST_INIT(bitflags, list(1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 204
 		REMOVE_TRAIT(x, TRAIT_KEEP_TOGETHER, KEEP_TOGETHER_ORIGINAL);\
 	else if(!HAS_TRAIT(x, TRAIT_KEEP_TOGETHER))\
 	 	x.appearance_flags &= ~KEEP_TOGETHER
+
+/// 33554431 (2^24 - 1) is the maximum value our bitflags can reach.
+#define MAX_BITFLAG_DIGITS 8