diff --git a/src/com/fsck/k9/mail/store/LocalStore.java b/src/com/fsck/k9/mail/store/LocalStore.java
index 9647e8ce5..f8438e79f 100644
--- a/src/com/fsck/k9/mail/store/LocalStore.java
+++ b/src/com/fsck/k9/mail/store/LocalStore.java
@@ -6279,7 +6279,7 @@ 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) );
                     }
                     if (isSet(Flag.FLAGGED))
                     {