diff --git a/lib/fog/rackspace/docs/storage.md b/lib/fog/rackspace/docs/storage.md
index 99c5069d9..6f9b63feb 100644
--- a/lib/fog/rackspace/docs/storage.md
+++ b/lib/fog/rackspace/docs/storage.md
@@ -382,8 +382,8 @@ Cloud Files requires files larger than 5 GB to be uploaded into segments along w
 	    read = 0
 	    # upload segment to cloud files
 	    service.put_object("my_container", "large_file/#{segment}", nil, options = {}) do
-	      if (offset < SEGMENT_LIMIT) && (read.zero? || read == BUFFER_SIZE)
-	        buf = f.sysread(BUFFER_SIZE)
+	      if (offset < SEGMENT_LIMIT) && !f.eof?
+	        buf = f.read(BUFFER_SIZE)
 	        read = buf.size
 	        offset += read
 	        buf
diff --git a/lib/fog/rackspace/examples/storage/upload_large_files.rb b/lib/fog/rackspace/examples/storage/upload_large_files.rb
index 270d414bb..33443feef 100644
--- a/lib/fog/rackspace/examples/storage/upload_large_files.rb
+++ b/lib/fog/rackspace/examples/storage/upload_large_files.rb
@@ -69,9 +69,9 @@ File.open(file_name) do |f|
     offset = 0
     read = 0
     service.put_object(directory.key, "#{segment_name}/#{segment}", nil, options = {}) do
-      if (offset < SEGMENT_LIMIT) && (read.zero? || read == BUFFER_SIZE)
+      if (offset < SEGMENT_LIMIT) && !f.eof?
         print "."
-        buf = f.sysread(BUFFER_SIZE)
+        buf = f.read(BUFFER_SIZE)
         read = buf.size
         offset += read
         buf