diff -ruN cheatah.cpp cheatah.cpp
--- cheatah.cpp	Thu Feb 19 21:50:28 2004
+++ cheatah.cpp	Thu Feb 19 21:50:32 2004
@@ -28,6 +28,7 @@
 #include <gbfplain.h>
 #include <thmlplain.h>
 #include <string.h>
+#include <assert.h>
 
 using namespace sword;
 using namespace std;