diff --git a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddContactState.java b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddContactState.java
index e2eaca306..4a938d6c9 100644
--- a/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddContactState.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/contact/add/nearby/AddContactState.java
@@ -52,6 +52,10 @@ abstract class AddContactState {
 
 		static class WrongQrCodeVersion extends Failed {
 
+			/**
+			 * True if the app producing the code is too old.
+			 * False if the scanning app is too old.
+			 */
 			final boolean qrCodeTooOld;
 
 			WrongQrCodeVersion(boolean qrCodeTooOld) {