diff --git a/evernote-sdk-ios/EvernoteSession.m b/evernote-sdk-ios/EvernoteSession.m
index c66296d..c942ea5 100755
--- a/evernote-sdk-ios/EvernoteSession.m
+++ b/evernote-sdk-ios/EvernoteSession.m
@@ -326,6 +326,9 @@ - (void)logout
     // Clear all clients
     [self clearAllClients];
     
+    if (!authToken || authToken.length == 0) {
+        return;
+    }
     // Revoke the token, this is not necessary, but it's good practice
     [[EvernoteUserStore userStore] revokeLongSessionWithAuthenticationToken:authToken success:nil failure:nil];
 }