1 files changed, 3 insertions, 1 deletions

diff --git a/lib/sitecing_interface_cgi.cc b/lib/sitecing_interface_cgi.cc
index 59ae25a..1acb23c 100644
--- a/lib/sitecing_interface_cgi.cc
+++ b/lib/sitecing_interface_cgi.cc
@@ -12,25 +12,27 @@ namespace sitecing {
         headers.clear();
         headers["Content-Type"] = "text/html";
         prebuffer.str("");
         headers_flushed = false;
         set_buffering(true);
     }
 
     void sitecing_interface_cgi::flush(bool keep_buffering) {
         assert(cgigw);
         flush_headers();
         if(is_buffering()) {
             streampos count = prebuffer.pubseekoff(0,ios_base::cur,ios_base::out);
-            cgigw->out().write(prebuffer.str().c_str(),count);
+            if(count>0) {
+                cgigw->out().write(prebuffer.str().c_str(),count);
+            }
             prebuffer.str("");
         }
         cgigw->out().flush();
         set_buffering(keep_buffering);
     }
 
     void sitecing_interface_cgi::set_buffering(bool do_buffer) {
         if(!do_buffer)
             flush_headers();
         outs.rdbuf(do_buffer?&prebuffer:cgigw->out().rdbuf());
     }