diff --git a/src/com/fsck/k9/mail/store/LocalStore.java b/src/com/fsck/k9/mail/store/LocalStore.java
index 300f16d51..499ee7012 100644
--- a/src/com/fsck/k9/mail/store/LocalStore.java
+++ b/src/com/fsck/k9/mail/store/LocalStore.java
@@ -6295,7 +6295,7 @@ public class LocalStore extends Store implements Serializable, LocalStoreMigrati
                     {
                         if (set != isSet(Flag.SEEN))
                         {
-                            folder.setUnreadMessageCount(folder.getUnreadMessageCount() + ( set ? 1: -1) );
+                            folder.setUnreadMessageCount(folder.getUnreadMessageCount() + ( set ? -1: 1) );
                         }
                     }