diff --git a/README.txt b/README.txt
index 970e39f..c8a317d 100644
--- a/README.txt
+++ b/README.txt
@@ -246,6 +246,7 @@ You also need to place these rules at the very end of your htaccess file, after
     # Unset unnecessary headers.
     Header unset Last-Modified
     Header unset Pragma
+    Header unset Accept-Ranges
 
     # Make these files publicly cacheable.
     Header append Cache-Control "public"
diff --git a/advagg.module b/advagg.module
index d8824d7..b7d2ebf 100644
--- a/advagg.module
+++ b/advagg.module
@@ -2702,6 +2702,7 @@ function advagg_htaccess_check_generate($dest, $force = FALSE) {
   $data .= "    # Unset unnecessary headers.\n";
   $data .= "    Header unset Last-Modified\n";
   $data .= "    Header unset Pragma\n";
+  $data .= "    Header unset Accept-Ranges\n";
   $data .= "\n";
   $data .= "    # Make these files publicly cacheable.\n";
   $data .= "    Header append Cache-Control \"public\"\n";