diff --git a/enigma/src/main/java/org/quiltmc/enigma/api/analysis/index/mapping/PackageIndex.java b/enigma/src/main/java/org/quiltmc/enigma/api/analysis/index/mapping/PackageIndex.java
index 09e184795..c8bb1ef60 100644
--- a/enigma/src/main/java/org/quiltmc/enigma/api/analysis/index/mapping/PackageIndex.java
+++ b/enigma/src/main/java/org/quiltmc/enigma/api/analysis/index/mapping/PackageIndex.java
@@ -10,6 +10,7 @@
 
 /**
  * An indexer that saves the names of all currently existing packages.
+ * This index contains all existing packages, regardless of whether they have any classes directly inside them.
  */
 public class PackageIndex implements MappingsIndexer {
 	private final Multimap<ClassEntry, String> packageNames = HashMultimap.create();