diff --git a/project/src/ui/FileDialog.cpp b/project/src/ui/FileDialog.cpp
index a43c1fdba..d3b745ad0 100644
--- a/project/src/ui/FileDialog.cpp
+++ b/project/src/ui/FileDialog.cpp
@@ -1,5 +1,6 @@
 #include <ui/FileDialog.h>
 #include <stdio.h>
+#include <cstdlib>
 
 #include <tinyfiledialogs.h>