diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/UncachedKeyRing.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/UncachedKeyRing.java
index 5c8a85de9..20e78d7fa 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/UncachedKeyRing.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/UncachedKeyRing.java
@@ -45,6 +45,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.Arrays;
 import java.util.Comparator;
 import java.util.Date;
 import java.util.Iterator;
@@ -692,7 +693,8 @@ public class UncachedKeyRing {
 
         long masterKeyId = other.getMasterKeyId();
 
-        if (getMasterKeyId() != masterKeyId) {
+        if (getMasterKeyId() != masterKeyId
+                || Arrays.equals(getFingerprint(), other.getFingerprint())) {
             log.add(LogLevel.ERROR, LogType.MSG_MG_HETEROGENEOUS, indent);
             return null;
         }
diff --git a/OpenKeychain/src/main/res/values/strings.xml b/OpenKeychain/src/main/res/values/strings.xml
index 20a149956..0da651b03 100644
--- a/OpenKeychain/src/main/res/values/strings.xml
+++ b/OpenKeychain/src/main/res/values/strings.xml
@@ -616,7 +616,7 @@
     <string name="msg_mg_public">Merging into public keyring %s</string>
     <string name="msg_mg_secret">Merging into secret keyring %s</string>
     <string name="msg_mg_fatal_encode">Fatal error encoding signature</string>
-    <string name="msg_mg_heterogeneous">Tried to consolidate heterogeneous keyrings</string>
+    <string name="msg_mg_heterogeneous">Tried to merge keyrings with differing fingerprints!</string>
     <string name="msg_mg_new_subkey">Adding new subkey %s</string>
     <string name="msg_mg_found_new">Found %s new certificates in keyring</string>
     <string name="msg_mg_unchanged">No new certificates</string>