--- aspell-0.50.3/prog/checker_string.cpp.gcc33	2003-05-22 22:52:59.000000000 -0400
+++ aspell-0.50.3/prog/checker_string.cpp	2003-05-22 22:53:13.000000000 -0400
@@ -4,6 +4,7 @@
 // license along with this library if you did not you can find
 // it at http://www.gnu.org/.
 
+#include <assert.h>
 #include "checker_string.hpp"
 #include "speller.hpp"
 #include "document_checker.hpp"