diff --git a/briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotManager.java b/briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotManager.java
index 377a91fe3..4d8d5e65a 100644
--- a/briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotManager.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/hotspot/HotspotManager.java
@@ -432,9 +432,10 @@ class HotspotManager {
 		return "WIFI:S:" + ssid + ";T:WPA;P:" + password + ";;";
 	}
 
-	private static final String digits = "123456789"; // avoid 0
-	private static final String letters = "abcdefghijkmnopqrstuvwxyz"; // no l
-	private static final String LETTERS = "ABCDEFGHJKLMNPQRSTUVWXYZ"; // no I, O
+	// exclude chars that are easy to confuse: 0 O, 5 S, 1 l I
+	private static final String digits = "2346789";
+	private static final String letters = "abcdefghijkmnopqrstuvwxyz";
+	private static final String LETTERS = "ABCDEFGHJKLMNPQRTUVWXYZ";
 
 	private String getRandomString(int length) {
 		char[] c = new char[length];