diff --git a/src/xenia/base/string_util.h b/src/xenia/base/string_util.h
index e05b9b35f..b79c8433e 100644
--- a/src/xenia/base/string_util.h
+++ b/src/xenia/base/string_util.h
@@ -12,6 +12,7 @@
 
 #include <cinttypes>
 #include <cstdint>
+#include <cstdlib>
 #include <cstring>
 #include <string>