diff --git a/enabler/src/de/schildbach/pte/util/ParserUtils.java b/enabler/src/de/schildbach/pte/util/ParserUtils.java
index ce5cfa90..f10d8440 100644
--- a/enabler/src/de/schildbach/pte/util/ParserUtils.java
+++ b/enabler/src/de/schildbach/pte/util/ParserUtils.java
@@ -194,7 +194,7 @@ public final class ParserUtils
 					}
 				}
 				else if (responseCode == HttpURLConnection.HTTP_FORBIDDEN || responseCode == HttpURLConnection.HTTP_BAD_REQUEST
-						|| responseCode == HttpURLConnection.HTTP_NOT_ACCEPTABLE)
+						|| responseCode == HttpURLConnection.HTTP_NOT_ACCEPTABLE || responseCode == HttpURLConnection.HTTP_UNAVAILABLE)
 				{
 					throw new BlockedException(url);
 				}
@@ -353,7 +353,7 @@ public final class ParserUtils
 				}
 			}
 			else if (responseCode == HttpURLConnection.HTTP_FORBIDDEN || responseCode == HttpURLConnection.HTTP_BAD_REQUEST
-					|| responseCode == HttpURLConnection.HTTP_NOT_ACCEPTABLE)
+					|| responseCode == HttpURLConnection.HTTP_NOT_ACCEPTABLE || responseCode == HttpURLConnection.HTTP_UNAVAILABLE)
 			{
 				throw new BlockedException(url);
 			}