diff --git a/thirdparty/assimp/include/assimp/scene.h b/thirdparty/assimp/include/assimp/scene.h
index e973f6c5b9d..df5d6f3b5e0 100644
--- a/thirdparty/assimp/include/assimp/scene.h
+++ b/thirdparty/assimp/include/assimp/scene.h
@@ -56,6 +56,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "material.h"
 #include "anim.h"
 #include "metadata.h"
+#include <cstdlib>
 
 #ifdef __cplusplus
 extern "C" {