--- aiksaurus-1.2.1.old/base/aiksaurus.t.cpp
+++ aiksaurus-1.2.1/base/aiksaurus.t.cpp
@@ -22,8 +22,11 @@
 #include "Aiksaurus.h"
 #include "AsciiCompare.h"
 #include "config.h"
+
+#include <cstdlib>
 #include <iostream>
 #include <string>
+
 using namespace std;
 using AiksaurusImpl::AsciiCompare;
 
--- aiksaurus-1.2.1.old/gtk/src/Display.cpp
+++ aiksaurus-1.2.1/gtk/src/Display.cpp
@@ -18,6 +18,8 @@
  * 02111-1307, USA.
  */
 
+#include <string.h>
+
 #include "Display.h"
 #include "Meaning.h"
 #include "DialogMediator.h"
--- aiksaurus-1.2.1.old/gtk/src/gtkAiksaur.t.cpp
+++ aiksaurus-1.2.1/gtk/src/gtkAiksaur.t.cpp
@@ -21,8 +21,11 @@
 #include <AiksaurusGTK.h>
 #include "config.h"
 #include <gtk/gtk.h>
+
+#include <cstdlib>
 #include <iostream>
 #include <string>
+
 using namespace std;
 
 int main(int argc, char** argv)