ResponseBuilder.cc |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/ResponseBuilder.cc b/ResponseBuilder.cc
index 1135678..0356172 100644
--- a/ResponseBuilder.cc
+++ b/ResponseBuilder.cc
@@ -41,6 +41,7 @@ static char rcsid[] not_used = { "$Id
 #include <string>
 #include <sstream>
 #include <cstring>
+#include <unistd.h>
 
 #include <uuid/uuid.h>	// used to build CID header value for data ddx
 #include "DAS.h"