diff --git a/src/core/preferences.cpp b/src/core/preferences.cpp
index 1d17bff17..3e528faac 100644
--- a/src/core/preferences.cpp
+++ b/src/core/preferences.cpp
@@ -50,6 +50,7 @@
 #include <winreg.h>
 #endif
 
+#include <cstdlib>
 #include "core/utils/fs.h"
 #include "core/utils/misc.h"