diff --git a/src/miscellaneous/debugging.cpp b/src/miscellaneous/debugging.cpp
index 1ed4ed1ef..02b8c6679 100755
--- a/src/miscellaneous/debugging.cpp
+++ b/src/miscellaneous/debugging.cpp
@@ -22,6 +22,7 @@
 #include <QDir>
 
 #include <cstdio>
+#include <cstdlib>
 
 #ifndef QT_NO_DEBUG_OUTPUT
 #if QT_VERSION >= 0x050000