diff --git a/src/main/java/de/sfuhrm/radiorecorder/metadata/StreamMetaData.java b/src/main/java/de/sfuhrm/radiorecorder/metadata/StreamMetaData.java
index 220c217..09aa384 100644
--- a/src/main/java/de/sfuhrm/radiorecorder/metadata/StreamMetaData.java
+++ b/src/main/java/de/sfuhrm/radiorecorder/metadata/StreamMetaData.java
@@ -62,6 +62,7 @@ public InputStream openStream(HttpConnection connection) throws IOException {
         Map<String,List<String>> headers = headersOriginal
                 .entrySet()
                 .stream()
+                .filter(e -> e.getKey() != null)
                 .collect(Collectors.toMap(e -> e.getKey().toLowerCase(), e -> e.getValue()));
         if (headers.containsKey(ICY_NAME)) {
             metaData.setStationName(Optional.of(headers.get(ICY_NAME).get(0)));