diff --git a/src/main/java/eu/siacs/conversations/entities/Contact.java b/src/main/java/eu/siacs/conversations/entities/Contact.java
index 55f5443a7..72ce1a5a6 100644
--- a/src/main/java/eu/siacs/conversations/entities/Contact.java
+++ b/src/main/java/eu/siacs/conversations/entities/Contact.java
@@ -301,7 +301,7 @@ public class Contact implements ListItem, Blockable {
 					for (int i = 0; i < prints.length(); ++i) {
 						final String print = prints.isNull(i) ? null : prints.getString(i);
 						if (print != null && !print.isEmpty()) {
-							fingerprints.add(prints.getString(i));
+							fingerprints.add(prints.getString(i).toLowerCase(Locale.US));
 						}
 					}
 				}
diff --git a/src/main/java/eu/siacs/conversations/entities/Conversation.java b/src/main/java/eu/siacs/conversations/entities/Conversation.java
index 245ff2885..9605fefc3 100644
--- a/src/main/java/eu/siacs/conversations/entities/Conversation.java
+++ b/src/main/java/eu/siacs/conversations/entities/Conversation.java
@@ -20,6 +20,7 @@ import java.util.Collections;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.crypto.PgpDecryptionService;
@@ -627,7 +628,7 @@ public class Conversation extends AbstractEntity implements Blockable, Comparabl
 					return null;
 				}
 				DSAPublicKey remotePubKey = (DSAPublicKey) getOtrSession().getRemotePublicKey();
-				this.otrFingerprint = getAccount().getOtrService().getFingerprint(remotePubKey);
+				this.otrFingerprint = getAccount().getOtrService().getFingerprint(remotePubKey).toLowerCase(Locale.US);
 			} catch (final OtrCryptoException | UnsupportedOperationException ignored) {
 				return null;
 			}