--- lexer_v3.c.orig
+++ lexer_v3.c
@@ -3128,7 +3128,7 @@ int yyFlexLexer::yy_get_next_buffer()
 
 	else
 		{
-			yy_size_t num_to_read =
+			int num_to_read =
 			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
 
 		while ( num_to_read <= 0 )