diff --git a/android/bazel.go b/android/bazel.go
index 26d70e4..8864db0 100644
--- a/android/bazel.go
+++ b/android/bazel.go
@@ -32,6 +32,10 @@
 	Bazel_module bazel.BazelModuleProperties
 }
 
+// namespacedVariableProperties is a map from a string representing a Soong
+// config variable namespace, like "android" or "vendor_name" to a struct
+// pointer representing the soong_config_variables property of a module created
+// by a soong_config_module_type or soong_config_module_type_import.
 type namespacedVariableProperties map[string]interface{}
 
 // BazelModuleBase contains the property structs with metadata for modules which can be converted to