diff --git a/libsignal-service/src/main/java/org/whispersystems/signalservice/internal/push/PushServiceSocket.java b/libsignal-service/src/main/java/org/whispersystems/signalservice/internal/push/PushServiceSocket.java
index f5f0545427..dd7199e895 100644
--- a/libsignal-service/src/main/java/org/whispersystems/signalservice/internal/push/PushServiceSocket.java
+++ b/libsignal-service/src/main/java/org/whispersystems/signalservice/internal/push/PushServiceSocket.java
@@ -1095,7 +1095,7 @@ public class PushServiceSocket {
    */
   public @NonNull ACI getAciByUsernameHash(String usernameHash) throws IOException {
     String response = makeServiceRequestWithoutAuthentication(
-        String.format(GET_USERNAME_PATH, URLEncoder.encode(usernameHash, StandardCharsets.UTF_8.toString())),
+        String.format(GET_USERNAME_PATH, URLEncoder.encode(usernameHash, StandardCharsets.UTF_8.name())),
         "GET",
         null,
         NO_HEADERS,