diff --git a/src/out.h b/src/out.h
index 7ecf347..e2fd0b1 100644
--- a/src/out.h
+++ b/src/out.h
@@ -104,7 +104,7 @@
  * @param[in] out Printer handler.
  * @return Type of the printer's output.
  */
-LY_OUT_TYPE ly_out_type(const struct ly_out *out);
+LIBYANG_API_DECL LY_OUT_TYPE ly_out_type(const struct ly_out *out);
 
 /**
  * @brief Reset the output medium to write from its beginning, so the following printer function will rewrite the current data
@@ -119,7 +119,7 @@
  * @return LY_SUCCESS in case of success
  * @return LY_ESYS in case of failure
  */
-LY_ERR ly_out_reset(struct ly_out *out);
+LIBYANG_API_DECL LY_ERR ly_out_reset(struct ly_out *out);
 
 /**
  * @brief Generic write callback for data printed by libyang.
@@ -141,7 +141,7 @@
  * @return LY_SUCCESS in case of success
  * @return LY_EMEM in case allocating the @p out handler fails.
  */
-LY_ERR ly_out_new_clb(ly_write_clb writeclb, void *user_data, struct ly_out **out);
+LIBYANG_API_DECL LY_ERR ly_out_new_clb(ly_write_clb writeclb, void *user_data, struct ly_out **out);
 
 /**
  * @brief Get or reset callback function associated with a callback printer handler.
@@ -151,7 +151,7 @@
  * printer callback is returned.
  * @return Previous printer callback.
  */
-ly_write_clb ly_out_clb(struct ly_out *out, ly_write_clb writeclb);
+LIBYANG_API_DECL ly_write_clb ly_out_clb(struct ly_out *out, ly_write_clb writeclb);
 
 /**
  * @brief Get or reset callback function's argument associated with a callback printer handler.
@@ -161,7 +161,7 @@
  * If NULL, only the current file descriptor value is returned.
  * @return The previous callback argument.
  */
-void *ly_out_clb_arg(struct ly_out *out, void *arg);
+LIBYANG_API_DECL void *ly_out_clb_arg(struct ly_out *out, void *arg);
 
 /**
  * @brief Create printer handler using file descriptor.
@@ -171,7 +171,7 @@
  * @return LY_SUCCESS in case of success
  * @return LY_ERR value in case of failure.
  */
-LY_ERR ly_out_new_fd(int fd, struct ly_out **out);
+LIBYANG_API_DECL LY_ERR ly_out_new_fd(int fd, struct ly_out **out);
 
 /**
  * @brief Get or reset file descriptor printer handler.
@@ -181,7 +181,7 @@
  * @return Previous value of the file descriptor. Note that caller is responsible for closing the returned file descriptor in case of setting new descriptor @p fd.
  * @return -1 in case of error when setting up the new file descriptor.
  */
-int ly_out_fd(struct ly_out *out, int fd);
+LIBYANG_API_DECL int ly_out_fd(struct ly_out *out, int fd);
 
 /**
  * @brief Create printer handler using file stream.
@@ -191,7 +191,7 @@
  * @return LY_SUCCESS in case of success
  * @return LY_ERR value in case of failure.
  */
-LY_ERR ly_out_new_file(FILE *f, struct ly_out **out);
+LIBYANG_API_DECL LY_ERR ly_out_new_file(FILE *f, struct ly_out **out);
 
 /**
  * @brief Get or reset file stream printer handler.
@@ -200,7 +200,7 @@
  * @param[in] f Optional new file stream for the handler. If NULL, only the current file stream is returned.
  * @return Previous file stream of the handler. Note that caller is responsible for closing the returned stream in case of setting new stream @p f.
  */
-FILE *ly_out_file(struct ly_out *out, FILE *f);
+LIBYANG_API_DECL FILE *ly_out_file(struct ly_out *out, FILE *f);
 
 /**
  * @brief Create printer handler using memory to dump data.
@@ -213,7 +213,7 @@
  * @return LY_SUCCESS in case of success
  * @return LY_ERR value in case of failure.
  */
-LY_ERR ly_out_new_memory(char **strp, size_t size, struct ly_out **out);
+LIBYANG_API_DECL LY_ERR ly_out_new_memory(char **strp, size_t size, struct ly_out **out);
 
 /**
  * @brief Get or change memory where the data are dumped.
@@ -225,7 +225,7 @@
  * parameter is ignored.
  * @return Previous dumped data. Note that the caller is responsible to free the data in case of changing string pointer @p strp.
  */
-char *ly_out_memory(struct ly_out *out, char **strp, size_t size);
+LIBYANG_API_DECL char *ly_out_memory(struct ly_out *out, char **strp, size_t size);
 
 /**
  * @brief Create printer handler file of the given filename.
@@ -235,7 +235,7 @@
  * @return NULL in case of error.
  * @return Created printer handler supposed to be passed to different ly*_print_*() functions.
  */
-LY_ERR ly_out_new_filepath(const char *filepath, struct ly_out **out);
+LIBYANG_API_DECL LY_ERR ly_out_new_filepath(const char *filepath, struct ly_out **out);
 
 /**
  * @brief Get or change the filepath of the file where the printer prints the data.
@@ -249,7 +249,7 @@
  * @return Previous filepath string in case the @p filepath argument is NULL.
  * @return NULL if changing filepath succeeds and ((void *)-1) otherwise.
  */
-const char *ly_out_filepath(struct ly_out *out, const char *filepath);
+LIBYANG_API_DECL const char *ly_out_filepath(struct ly_out *out, const char *filepath);
 
 /**
  * @brief Generic printer of the given format string into the specified output.
@@ -260,13 +260,13 @@
  * @param[in] format Format string to be printed.
  * @return LY_ERR value, get number of the printed bytes using ::ly_out_printed.
  */
-LY_ERR ly_print(struct ly_out *out, const char *format, ...);
+LIBYANG_API_DECL LY_ERR ly_print(struct ly_out *out, const char *format, ...);
 
 /**
  * @brief Flush the output from any internal buffers and clean any auxiliary data.
  * @param[in] out Output specification.
  */
-void ly_print_flush(struct ly_out *out);
+LIBYANG_API_DECL void ly_print_flush(struct ly_out *out);
 
 /**
  * @brief Generic printer of the given string buffer into the specified output.
@@ -278,7 +278,7 @@
  * @param[in] len Length of the data to print in the @p buf.
  * @return LY_ERR value, get number of the printed bytes using ::ly_out_printed.
  */
-LY_ERR ly_write(struct ly_out *out, const char *buf, size_t len);
+LIBYANG_API_DECL LY_ERR ly_write(struct ly_out *out, const char *buf, size_t len);
 
 /**
  * @brief Get the number of printed bytes by the last function.
@@ -286,7 +286,7 @@
  * @param[in] out Out structure used.
  * @return Number of printed bytes.
  */
-size_t ly_out_printed(const struct ly_out *out);
+LIBYANG_API_DECL size_t ly_out_printed(const struct ly_out *out);
 
 /**
  * @brief Free the printer handler.
@@ -295,7 +295,7 @@
  * @param[in] destroy Flag to free allocated buffer (for LY_OUT_MEMORY) or to
  * close stream/file descriptor (for LY_OUT_FD, LY_OUT_FDSTREAM and LY_OUT_FILE)
  */
-void ly_out_free(struct ly_out *out, void (*clb_arg_destructor)(void *arg), ly_bool destroy);
+LIBYANG_API_DECL void ly_out_free(struct ly_out *out, void (*clb_arg_destructor)(void *arg), ly_bool destroy);
 
 #ifdef __cplusplus
 }