diff --git a/src/output/HttpdClient.cxx b/src/output/HttpdClient.cxx
index 8e13fda38..dc337053d 100644
--- a/src/output/HttpdClient.cxx
+++ b/src/output/HttpdClient.cxx
@@ -30,6 +30,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <stdio.h>
 
 HttpdClient::~HttpdClient()
 {