diff --git a/src/out.c b/src/out.c
index 3272d80..868e711 100644
--- a/src/out.c
+++ b/src/out.c
@@ -89,14 +89,14 @@
     return 1;
 }
 
-API LY_OUT_TYPE
+LIBYANG_API_DEF LY_OUT_TYPE
 ly_out_type(const struct ly_out *out)
 {
     LY_CHECK_ARG_RET(NULL, out, LY_OUT_ERROR);
     return out->type;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_out_new_clb(ly_write_clb writeclb, void *user_data, struct ly_out **out)
 {
     LY_CHECK_ARG_RET(NULL, out, writeclb, LY_EINVAL);
@@ -111,7 +111,7 @@
     return LY_SUCCESS;
 }
 
-API ly_write_clb
+LIBYANG_API_DEF ly_write_clb
 ly_out_clb(struct ly_out *out, ly_write_clb writeclb)
 {
     ly_write_clb prev_clb;
@@ -127,7 +127,7 @@
     return prev_clb;
 }
 
-API void *
+LIBYANG_API_DEF void *
 ly_out_clb_arg(struct ly_out *out, void *arg)
 {
     void *prev_arg;
@@ -143,7 +143,7 @@
     return prev_arg;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_out_new_fd(int fd, struct ly_out **out)
 {
     LY_CHECK_ARG_RET(NULL, out, fd != -1, LY_EINVAL);
@@ -156,7 +156,7 @@
     return LY_SUCCESS;
 }
 
-API int
+LIBYANG_API_DEF int
 ly_out_fd(struct ly_out *out, int fd)
 {
     int prev_fd;
@@ -198,7 +198,7 @@
     return prev_fd;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_out_new_file(FILE *f, struct ly_out **out)
 {
     LY_CHECK_ARG_RET(NULL, out, f, LY_EINVAL);
@@ -212,7 +212,7 @@
     return LY_SUCCESS;
 }
 
-API FILE *
+LIBYANG_API_DEF FILE *
 ly_out_file(struct ly_out *out, FILE *f)
 {
     FILE *prev_f;
@@ -228,7 +228,7 @@
     return prev_f;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_out_new_memory(char **strp, size_t size, struct ly_out **out)
 {
     LY_CHECK_ARG_RET(NULL, out, strp, LY_EINVAL);
@@ -274,7 +274,7 @@
     return data;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_out_reset(struct ly_out *out)
 {
     LY_CHECK_ARG_RET(NULL, out, LY_EINVAL);
@@ -320,7 +320,7 @@
     return LY_SUCCESS;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_out_new_filepath(const char *filepath, struct ly_out **out)
 {
     LY_CHECK_ARG_RET(NULL, out, filepath, LY_EINVAL);
@@ -340,7 +340,7 @@
     return LY_SUCCESS;
 }
 
-API const char *
+LIBYANG_API_DEF const char *
 ly_out_filepath(struct ly_out *out, const char *filepath)
 {
     FILE *f;
@@ -366,7 +366,7 @@
     return NULL;
 }
 
-API void
+LIBYANG_API_DEF void
 ly_out_free(struct ly_out *out, void (*clb_arg_destructor)(void *arg), ly_bool destroy)
 {
     if (!out) {
@@ -493,7 +493,7 @@
     return ret;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_print(struct ly_out *out, const char *format, ...)
 {
     LY_ERR ret;
@@ -508,7 +508,7 @@
     return ret;
 }
 
-API void
+LIBYANG_API_DEF void
 ly_print_flush(struct ly_out *out)
 {
     switch (out->type) {
@@ -645,7 +645,7 @@
     return ret;
 }
 
-API LY_ERR
+LIBYANG_API_DEF LY_ERR
 ly_write(struct ly_out *out, const char *buf, size_t len)
 {
     out->func_printed = 0;
@@ -653,7 +653,7 @@
     return ly_write_(out, buf, len);
 }
 
-API size_t
+LIBYANG_API_DEF size_t
 ly_out_printed(const struct ly_out *out)
 {
     return out->func_printed;