diff --git a/fhem/CHANGED b/fhem/CHANGED
index 81c9c3936..e944df7f1 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+ - change:  70_ZoneMinder: fixed authentication for 1.34.x, API 2.0
  - feature: 98_weekprofile: custom temperature keywords
  - change:  72_TA_CMI_JSON: introduced module package
  - bugfix:  73_ElectricityCalculator: Use Time::Local added for compatibility
diff --git a/fhem/FHEM/70_ZoneMinder.pm b/fhem/FHEM/70_ZoneMinder.pm
index 3fac34976..4ea73928d 100755
--- a/fhem/FHEM/70_ZoneMinder.pm
+++ b/fhem/FHEM/70_ZoneMinder.pm
@@ -219,7 +219,7 @@ sub ZoneMinder_Get_API_Login_URL {
     $result = "$zmWebUrl/index.php?username=$username&password=$password&action=login&view=console";
   } elsif ( $apiVersion eq 'post132' ) {
     my $zmApiUrl = ZoneMinder_getZmApiUrl($hash);
-    $result = "$zmApiUrl/host/login.json?user=$username&pass=$password";
+    $result = "$zmApiUrl/host/login.json?user=$username&pass=$password&stateful=1";
   }
 
   return $result;