diff --git a/toolchain/sem_ir/typed_insts.h b/toolchain/sem_ir/typed_insts.h
index 4f55b3fd49d3..37c516c9691f 100644
--- a/toolchain/sem_ir/typed_insts.h
+++ b/toolchain/sem_ir/typed_insts.h
@@ -179,7 +179,7 @@ struct Assign {
   InstId rhs_id;
 };
 
-// An associated type declaration in an interface, such as `let T:! type;`.
+// An associated constant declaration in an interface, such as `let T:! type;`.
 struct AssociatedConstantDecl {
   static constexpr auto Kind =
       InstKind::AssociatedConstantDecl.Define<Parse::NodeId>(