diff --git a/wpa_supplicant/wpa_gui-qt4/peers.cpp b/wpa_supplicant/wpa_gui-qt4/peers.cpp
index 12626f591..f963e318d 100644
--- a/wpa_supplicant/wpa_gui-qt4/peers.cpp
+++ b/wpa_supplicant/wpa_gui-qt4/peers.cpp
@@ -12,6 +12,7 @@
  * See README and COPYING for more details.
  */
 
+#include <cstdio>
 #include <QImageReader>
 
 #include "wpagui.h"