diff --git a/src/engine/platform/sound/nds.cpp b/src/engine/platform/sound/nds.cpp
index fa45048a0..75fbaf925 100644
--- a/src/engine/platform/sound/nds.cpp
+++ b/src/engine/platform/sound/nds.cpp
@@ -38,6 +38,7 @@ Tech info: https://problemkaputt.de/gbatek.htm
 */
 
 #include "nds.hpp"
+#include <stdlib.h>
 
 namespace nds_sound_emu
 {
@@ -645,4 +646,4 @@ namespace nds_sound_emu
 		}
 	}
 
-}; // namespace nds_sound_emu
\ No newline at end of file
+}; // namespace nds_sound_emu