diff --git a/code/game/dna/dna2.dm b/code/game/dna/dna2.dm
index b0323825c70..2dfe4d660c9 100644
--- a/code/game/dna/dna2.dm
+++ b/code/game/dna/dna2.dm
@@ -14,6 +14,7 @@ GLOBAL_LIST_INIT(assigned_mutation_blocks, new(DNA_SE_LENGTH))
 // Used to determine what each block means (admin hax and species stuff on /vg/, mostly)
 GLOBAL_LIST_INIT(assigned_blocks, new(DNA_SE_LENGTH))
 
+/// Assoc list. Key = type of the mutation, value = the mutation
 GLOBAL_LIST_EMPTY(dna_mutations)
 
 GLOBAL_LIST_EMPTY(good_blocks)