Use zip_XXX_t instead of struct zip_XXX or enum zip_XXX.
diff --git a/lib/zip_get_file_comment.c b/lib/zip_get_file_comment.c
index 20bbf99..d5f50bf 100644
--- a/lib/zip_get_file_comment.c
+++ b/lib/zip_get_file_comment.c
@@ -37,7 +37,7 @@
 
 
 ZIP_EXTERN const char *
-zip_get_file_comment(struct zip *za, zip_uint64_t idx, int *lenp, int flags)
+zip_get_file_comment(zip_t *za, zip_uint64_t idx, int *lenp, int flags)
 {
     zip_uint32_t len;
     const char *s;