diff --git a/wpa_supplicant/wpa_gui/networkconfig.ui.h b/wpa_supplicant/wpa_gui/networkconfig.ui.h
index eb7baf173..8259bfc7e 100644
--- a/wpa_supplicant/wpa_gui/networkconfig.ui.h
+++ b/wpa_supplicant/wpa_gui/networkconfig.ui.h
@@ -10,6 +10,7 @@
 ** destructor.
 *****************************************************************************/
 
+#include <stdlib.h>
 
 enum {
     AUTH_NONE = 0,
diff --git a/wpa_supplicant/wpa_gui/userdatarequest.ui.h b/wpa_supplicant/wpa_gui/userdatarequest.ui.h
index 4b47ccdba..66d4478d2 100644
--- a/wpa_supplicant/wpa_gui/userdatarequest.ui.h
+++ b/wpa_supplicant/wpa_gui/userdatarequest.ui.h
@@ -10,6 +10,8 @@
 ** destructor.
 *****************************************************************************/
 
+#include <stdlib.h>
+
 int UserDataRequest::setParams(WpaGui *_wpagui, const char *reqMsg)
 {
     char *tmp, *pos, *pos2;
diff --git a/wpa_supplicant/wpa_gui/wpagui.ui.h b/wpa_supplicant/wpa_gui/wpagui.ui.h
index 56fe912fe..678ff1be3 100644
--- a/wpa_supplicant/wpa_gui/wpagui.ui.h
+++ b/wpa_supplicant/wpa_gui/wpagui.ui.h
@@ -16,6 +16,7 @@
 #include <unistd.h>
 #endif
 
+#include <stdlib.h>
 
 void WpaGui::init()
 {