diff --git a/modules/src/main/java/org/archive/modules/fetcher/FetchHTTP.java b/modules/src/main/java/org/archive/modules/fetcher/FetchHTTP.java
index 1f78a7e9..368cc650 100644
--- a/modules/src/main/java/org/archive/modules/fetcher/FetchHTTP.java
+++ b/modules/src/main/java/org/archive/modules/fetcher/FetchHTTP.java
@@ -669,7 +669,7 @@ public class FetchHTTP extends Processor implements Lifecycle {
         
         long contentLength = -1l;
         Header h = response.getLastHeader("content-length");
-        if (h != null) {
+        if (h != null && h.getValue().trim().length()>0) {
             contentLength = Long.parseLong(h.getValue());
         }
         try {