1 files changed, 3 insertions, 1 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/EmailKeyHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/EmailKeyHelper.java
index 5d281d5b0..d8efdc480 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/EmailKeyHelper.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/EmailKeyHelper.java
@@ -21,6 +21,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Messenger;
+
 import org.sufficientlysecure.keychain.keyimport.HkpKeyserver;
 import org.sufficientlysecure.keychain.keyimport.ImportKeysListEntry;
 import org.sufficientlysecure.keychain.keyimport.Keyserver;
@@ -29,6 +30,7 @@ import org.sufficientlysecure.keychain.service.KeychainIntentService;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Set;
 
 public class EmailKeyHelper {
@@ -86,7 +88,7 @@ public class EmailKeyHelper {
             for (ImportKeysListEntry key : keyServer.search(mail)) {
                 if (key.isRevoked() || key.isExpired()) continue;
                 for (String userId : key.getUserIds()) {
-                    if (userId.toLowerCase().contains(mail.toLowerCase())) {
+                    if (userId.toLowerCase().contains(mail.toLowerCase(Locale.ENGLISH))) {
                         keys.add(key);
                     }
                 }