diff --git a/src/main/java/org/kohsuke/github/GitHub.java b/src/main/java/org/kohsuke/github/GitHub.java
index 91b34b1d7..faffd27d7 100644
--- a/src/main/java/org/kohsuke/github/GitHub.java
+++ b/src/main/java/org/kohsuke/github/GitHub.java
@@ -320,7 +320,7 @@ public class GitHub {
      */
     private InputStream wrapStream(HttpURLConnection uc, InputStream in) throws IOException {
         String encoding = uc.getContentEncoding();
-        if (encoding==null) return in;
+        if (encoding==null || in==null) return in;
         if (encoding.equals("gzip"))    return new GZIPInputStream(in);
 
         throw new UnsupportedOperationException("Unexpected Content-Encoding: "+encoding);