diff --git a/tools/configure/environment.cpp b/tools/configure/environment.cpp
index 5e0fa00c6c..80542e7697 100644
--- a/tools/configure/environment.cpp
+++ b/tools/configure/environment.cpp
@@ -42,6 +42,7 @@
 #include "environment.h"
 
 #include <process.h>
+#include <errno.h>
 #include <iostream>
 #include <qdebug.h>
 #include <QDir>