--- a/gamelogic.cpp
+++ b/gamelogic.cpp
@@ -25,6 +25,7 @@
 #include<fstream>
 #include<cstdio>
 #include<cctype>
+#include <cstdlib>
 
 #ifndef WIN32
 #include<unistd.h>
--- a/levelmap.cpp
+++ b/levelmap.cpp
@@ -21,6 +21,7 @@
 ////////////////////////////////////////////////////////////////////////
 
 // Language Includes
+#include <cstdlib>
 #include <cstdio>
 #include <cctype>
 #include <cstring>
--- a/mapedit.cpp
+++ b/mapedit.cpp
@@ -26,6 +26,8 @@
 #include<cstdio>
 #include<list>
 #include<vector>
+#include <cstdlib>
+#include <cstring>
 
 #ifndef WIN32
 #include<unistd.h>
--- a/modlist.cpp
+++ b/modlist.cpp
@@ -22,6 +22,7 @@
 
 #include <iostream>
 #include <fstream>
+#include <cstdlib>
 
 #ifdef WIN32
 #include <afxwin.h>
--- a/tile_spinner.cpp
+++ b/tile_spinner.cpp
@@ -24,6 +24,7 @@
 
 
 // Application Includes
+#include <cstdlib>
 #include "audio.h"
 #include "properties.h"
 #include "defs.h"